A Parent's Guide To Linux Web Filtering
Roblimo writes "Not all parents want their children exposed to everything on the Internet, especially porn. So far, virtually all home-level Net filtering software has been for Windows. This tutorial on NewsForge, by Joe Bolin, shows Linux-using parents how to set up Web filtering for *their* children -- and shows them how to customize filters to fit their own tastes and beliefs instead of relying on a commercial software company's ideas of 'good' and 'bad,' too."
The easier and more accurate it is for parents to filter content for their own children, based on their own values, the less likely it is for them to scream for the government to do it for them.
A nice how-to. This could be fun in the hands of kids to filter their parents Internet to only include toys and cartoons and... uhm... slashdot...
- Your stupidity got you into this mess, why can't it get you out? -Will Rogers
Really, is only naked women or men. In Mozilla Firebird, I have setted it to "Block images from goat.cx" (not visit!) and if my kids pictures of naked people find, fine. I did as child. I run linux but don't need this.
As friend said "You Americans are so puritanical!"
Read journal when you are not understand
This could really help push Linux for schools and libraries. (who don't need the extra expense of the "secure" kiosk's their paying for now.)
~G
...when it gets down to fundamentals, do what you have to do and shed no tears. Dr. Matson in Tunnel in the Sky
Well, this is good news for linux parents, and hopefully it will set a precedent for either, more people moving off of windows, or developers of filtering software for windows to make their products more easily customizable to what parents think their kids should not see, instead of what the company thinks their kids should not see
So there are what, 4 people using linux at home that also have intimate enough relationships to actually produce offspring
Make sure you add /. to that filter if you ever want your kids to grow up to be productive human beings. Otherwise they'll be just like the rest of us, lurking around until the next item is posted. I've got some work to go not do now ...
Steal This Sig
Those fun-loving shareware dudes and dames over at Freeverse have a customizable browser for kids, aptly named BumperCar. Don't know much about it, but I happened to see it on a browsing jag yesterday, and thought I'd mention it here.
The CB App. What's your 20?
I thought we were mostly in agreement here. Consorware is bad. Filters don't work.
Why is it that censorware suddenly becomes good when it's implemented by an open source program?
Granted all the software is released under GPL and source code included, all it would take is for the kid to either A) Learn a little C++ (or whatever language this software is coded in) to make the software worthless or B) Start hunting for a patch that someone else was nice enough to build. Though if your kid can learn C++ I presume he's probably mature enough to view anything he wants and parents should stay back. However full censorship in Linux,IMHO because of the nature of open source is just next to impossible. As it should be though :-)
...in bed
Its nice to see that Linux is really emerging as a Windows alternative for the whole family. ;-)
If at first you don't friccasse, fry fry a henAlso, it should give the kids a nice challenge to get around the blockers...
Its all fun and games until someone loses an eye... then its just fun.
This is better than letting some company configure it for you. A lot of the companies that make filtering software don't even allow you to know what their critiera is for blocking a site.
On the other hand, I tend to think that when my daughter becomes interested enough in sex to seek out these kinds of pages, that maybe it is better that she be able to.
Avoid Missing Ball for High Score
That's two too many, as far as the target audience is concerned. I'm no GNU/Linux programmer or anything, but what's stopping people from putting that all in one single installer?
I'll admit I didn't read on to see (God forbid) what other numerous (supposedly "easy") hoops that parents would have to jump through to get the desired result. Not that it matters; they'd probably already lost most of their target audience.
"Ask not what your country can do for you." --John F. Kennedy
I say just run the box in console mode, and if the kid can figure out how to configure X and open a browser, they are old enough for porn.
Seriously, this is a little strange in it's scope. In the fourth paragraph, it defines for the reader what a "server" is, and then they expect the reader to be comfortable just jumping right in and editing the squid config. Seems like a little user-friendliness is probably needed before we can consider the parental filtering thing taken care of...
Paper Pusher
I have been developing an algorithm that scans images and can detect whether there is a nipple in the image. If this were incorporated into an http filter, you could get rid of porn and possibly notify parents when nipple-laden images were being downloaded.
The only technical problem at present is that I can not discern between human nipples and animal nipples, so some images of cow udders and the like register false positives. Nevertheless, I think this is a very important algorithm.
I have considered selling this to the Justice Department, as Atty General Ashcroft has expressed an interest in this kind of software. However, I feel this is too important to be closed. I am happy to say the project will be listed at Sourceforge soon, and released under the GPL!!!
So much is made about filtering content for children, presumably to prevent them from wandering upon unsuitable content. The fundamental flaw with this (techological limitations notwithstanding) is the notion that kids under the age of 13 or so should be left alone to browse the net.
It seems to me that proper parenting requires an active participation with your kids, whether it be in watching TV, checking out books in a B&N, or spending time on the net. Simply throwing in a vchip, blocking channels or applying hole-ridden filters can never be a substitute for actively being entertained, lerning, etc. alongside your child.
At least I think I read that somewhere...
StrategyTalk.com, PC Game Forums
I don't have any kids, but if I did, I wouldn't filter a thing. I would install squid, write a perl script to parse out the domain names and report to me a count of each domainname reached.
I would tell the child that I had records of every site they visit, and step on them if they kept "making mistakes".
Yes, and they do generally charge more. They are usually run by religious organizations. The PAX network has been advertising their own filtered Internet service, for example.
Putting filtering on Linux doesn't make it better. Filtering still:
a) doesn't work. Kids who want pr0n will find it, or find a way to get around the filters; and
b) creates and adversarial relationship between parent and child instead of a collaborative one.
Having parents set up their own filters instead of trusting an outside organization to do it for them almost GUARANTEES that the filters will not be effective. Who has time to be comprehensive on content, given the rate at which new sites are created? The only alternative is to trust some organization that does have the resources to do a more comprehensive job, and even then will not be complete.
The more serious issue is the loss of trust demonstrated by putting filtering software on the computer.
No matter what people say, how futile it is etc etc, it's an important step in getting Linux to be more common in the educational environment. A school or library needs to be able to say "we tried our best!" when it comes to these things. It helps linux get its foot in the door.
It's nice tou know that you can turn your back for a minute, though. That's why I have a fenced in back yard. I know the kid can open the gate, and I know I still have to watch him.
What "average" users do you know that would be comfortable with modifying .conf files and all that other crap that this forces them to do?
Anyone who calls this process "easy" is completely out of touch with the average PC user.
"Ask not what your country can do for you." --John F. Kennedy
Then go looking for news articles about kids being lured to their death by people in chat rooms, etc. You'll find plenty.
You need to monitor what your kids are doing on the net. The children aren't responsible for their actions, You are.
Make sure that when they are very young, that you are with them any time that they are online.
Then, when they are old enough to understand, you open the Internet wide open and log everywhere they go. Make sure that they know you are logging.
Discuss with them what you think is inappropriate for them. If they visit sites that you don't approve of, talk to them about it.
Don't get me wrong, I love cool technology, but technology isn't a valid substitute for parenting.
Yes, my daughters love pill bottles. Love to try and open them and eat anything that pops out.
But according to half the people here I should let them at it.
I have installed two different filters on my kid's computers and I still find porn in my son's cache. Whether Linux or Windows, to date, the only filter that realy works 100% of the time while I am not at home is to disable the lan connection to the internet. It's only a matter of time until he figures that one out too.
While this might take care of keeping kids off a large number of porn sites, it still will allow kids through to sites with all pictures. Those can't be filtered by keyword.
My personal belief is that kids under a certain age should NEVER be on the Internet without close supervision. As the kids get older, they should be given more freedom to explore by themselves, but monitoring software is still a good idea.
A close friend of mine who's 18 and getting ready to go off to college still isn't allowed on the computer when her mom is at work during the day. The computer is password protected so the mom has to be around when they're on it. They just accept it and deal with it. She doesn't sit and watch over their shoulder now that they're older, but she's at least around and able to glance at the screen occasionally.
You have enemies? Good. That means you've stood up for something, sometime in your life. --Winston Churchill
Frankly, you're not going to beat sitting down with your kids and talking to them about where to go on the net and where not to. I mean this software helps but isn't that hard to get around. All the kid really has to do is boot the system with knoppix or root the box. Some people might laugh at that notion but think of what you would do at this age. Most linux people have that sort of "I want to do this just because I can" mentality. If that gene has passed on, you'll need a little more than iptables. :)
When I was 10, my dad had a net-nanny type program on the machine allegedly to protect my younger brother. It timed internet access and cut you off after a certain period. So I opened up regedit and ripped the program out manually. Sure, the system was barely functional, the network connection didn't work at all and the machine needed to be reinstalled - but that nanny software never came back.
Putting limits on material they want their children exposed to is a HUGE part of parenting. So why do you oppose software intended to let parents do just that?
"Ask not what your country can do for you." --John F. Kennedy
Regarding all the "kids will hack it" and "watch your kids" content so far.
The underlying issue is quite simple - Access to the Internet is the equivalent of allowing your kids to leave the yard without permission, not bothering to know where they are, who they're contacting or being contacted by and generally leaving them at the mercy of the big, bad world.
So, establishing them on isolated segement NAT'd computers where every single 0 and 1 goes through a router that their parents manage or through a proxy service of the same circumstance isn't anything more complicated than insuring that Jack or Jane ask permission to leave the yard and to know where they're going and who they'll see when they do.
With kids, you don't throw out the rules for sake of convenience or with the idea of being "progressive" about child rearing. The consequences are just too dire.
Mod me troll, if you must, I can't help it.
Does this mean parents will actually have to talk to their children? Does that mean they will actually have to teach them values and standards of their own?
You don't say. What a shocker!
I honestly don't see what the problem is. Although my world view has changed somewhat over the years, I don't *think* I react that differently to things now as to how I reacted when I was, say, 12 years old.
I think the grandparent is aware that bangbus is fantasy, but the problem is: will kids be this aware? If they see pretend rape happening and nothing being said against it, it is not unreasonable to be worried that they will view the real thing as fine too. Remember that a small child's mind works differently to ours.
All the ASCII porn on gopher really screwed me up back in 1994.
It's much easier to not use the Internet when it's as inaccessible as it was ten years ago. I think the only access in 1994 we had was when my oldest brother used his college account which dialed into a remote unix terminal, which you then connected to the internet from. Downloading was a pain. For instance, ftp went from the remote server to the unix terminal's home directory. That was pretty fast (probably T1), but you had to download again from the home directory over the terminal connection to the local machine. That was at 14.4kbps.
Even then, it was followed by buggy TCP/IP tools and a crappy, unstable version of 16-bit Netscape if you were in Windows 3.1.
Long story short, I bet you didn't use the Internet until 1994 because your parents said you weren't old enough - but rather because it wasn't feasible to use it until then. That and parents saying, "there's porn on the internet?" Assuming they knew what the Internet was at the time.
It would be cool if it didn't suck.
Has anyone applied a Bayesian filter to web content? This would be an interesting way to give the filter a set of initial conditions from which it could derive an ever-increasing better filtration of content based off the parent's initial criteria.
If there is a pre-existing application, I would interested to know.
Only use dialup. with a 14.4 modem.
Porn will take too long to transmit. They will be browsing without images in no time!
Or you could put things in your hosts file that you want to block access to. Much simpler, but I'm not sure you things would go with that whole black list there ;)
Not sure how all this is supposed to work and all, so anything I'm spouting off is strictly theoretical.
Couldn't someone float to a web-based proxy, get the stuff there, and pass it through the filters? If it's keyword-based, you could even probably parse it through a "translator" to get rid of those particular words.
It mentioned pushing traffic through the proxy -- does this mean that it'll be strictly on port 80? No FTP, no NNTP, no SMTP/POP, no Realplayer streams? Sounds lovely already.
I work at a place that does content filtering -- all MS-based with the proxy/filter hardwired to IE (this implies a few things, but I'll leave that as an exercise). Though this stops most folks from getting to certain places, the filter doesn't do too well taking out the IP-based addresses that some porn popups are made of. Even better, it won't stop anyone from receiving valid web-based e-mails that may contain "objectionable content" either in text or as attachments.
I believe filters are made to comply with rules. Otherwise, totalitarian dictator admins would simply restrict access to every port but 80...and even then, subject that to some heavy filtering and logging.
You are looking at this as though parents making mods or installing software are trying to prevent kids from looking at something they are actively searching for.
The real reason we want this stuff is so the kids won't stumble on to something bad they had no intention of finding. The lack of trust being demonstrated is a lack of trust toward every jerk on the internet that doesn't care about my kid.
That's my reason anyway. Does anyone here have kids?
This whole article is a complete waste since we all know that people who use Linux cannot attract the opposite sex which therefore means that they won't ever be able to have children. Its in the GPL too, somewhere around the 30th line...
"If you can comprehend the aforementioned statements and use this software, you will not get laid. Ever. I know this because I'm RMS and chicks dig bearded guys. I haven't been laid yet so you won't either."
Still, we all know that chicks dig BSD instead.
What I've done in the past is setup linux boxes for people with all outgoing access closed - with a script, the user entered the address they want to connect to (disney.com). The script then logs this, and allows outgoing access to the sight. This way, there isn't a lot of pre-setup stuff to do. With everyone understanding the usage is logged, it keeps them honest. Mom and dad can checkout the log with a web browser. Submitting content took some work to get figured out.... Not a perfect system, just a little different.
boycott slashdot February 10th - 17th check out: altSlashdot.org
Sorry, but I don't want my 10 year old daughter to be seeing pictues of violent and abusive sex, whether staged or not. Neither will I want my son to do, when he gets old enoughj to staart using the computer. Not to mention the many sites of brutal, if putatively consensual, abuse of women that are also out there. At ten, she is NOT ready to see pictures of women beaten bloody, being pissed and shat upon, and enduring mutilation of tits and genitals. Hell, I'm in my 40's and some of that shit is hard for ME to dismiss from my mind if/when I see it. Turning a child loose on the internet without supervision, is the psychic equivalent of sending them out to play on the freeway, without even giving them Safety Orange vests to wear.
Why don't various culture magazines offer filtering proxies tuned to reflect their cultural values? Like a Web "Reader's Digest". Different magazines would draw lines differently around sex, violence, gender, and other sociopolitical issues. Their magazine editorial would fill that out, and let people make consistent decisions through these infomediaries.
Of course this scheme doesn't thwart the porn-hungry mormon teenager, or the santablind pre-barmitzva. That's an NP-complete problem: a bad kid will just go to a friend's unfiltered web terminal. But I note the Slashdot oracle's fortune at the bottom-right of this posing page:
It is a wise father that knows his own child. -- William Shakespeare, "The Merchant of Venice"
--
make install -not war
I have done several network installs for people who have kids, and want web content filtering. Generally what is set up a gateway machine with a distribution of linux called "ClarkConnect" clarkconnect.org which is designed specifically to be used as a gateway. It already has dansguardian and squid installed, as well as a iptables, dhcpd, and other various useful features. What I really like about it, is that it has a nice web interface which allows my customers to actually make changes to dansguardian/squid, the firewall, and other services without having to actually know any linux commands. It's very user friendly.
I really have to disagree here. I'm 18, so it wasn't long ago that I had a child's immature mind. I remember I saw, indeed looked for, porn before I was even a teenager. I remember seeing Stile Project's most deformed genitalia list. Am I some screwed up sicko now? No. I'm a good student, 1600 on the SAT, over a full ride to college, blah blah blah. Images do not make a person. The most effect I'd say seeing that stuff has had on me is that it made me a tougher person. Hell, I'd say overall, the control over my mind I gained from being exposed to stuff like that was actually a beneficial experience. It's all in how a person deals with stuff like that. An unintelligent sick person might get ideas from graphic images, but such people are already screwed up. Parents probably need to pay more attention to the family environment they're creating and the examples they're setting than to pictures their kids run into on the web.
The truth is, as a little kid you don't really run into that much graphic content unless you want to. I seriously doubt bumping into a rare image of a woman in the procreative act while searching for whatever it is little kids search for is going to cause some serious damage. At most it will create an awkward situation with the parents. I think that's the root of this supposed problem. Parents don't like to deal with serious issues when it comes to their children. Their children are never going to have sex. Their children are never going to encounter death. Their children are never going to grow up. This is the real problem. It's parents unwillingness to deal with their children entering the real world. I'm not saying it's an easy thing to deal with, but it's something you have to deal with, not just blame the internet.
-ShadeOfBlue
Whoa there conclusion jumper, did I say I wanted to ban bangbus? No, I said I don't want my young children seeing depictions of rape and the general lack of respect for women that I see there. What is "painfully obvious" to you and I isn't so obvious to a 7 year old.
You miss the point entirely. This article is good because it puts the power of filtering in the hands of the parent, where it belongs *NOT* the government.
we have a few on our street who demand "GO SLOW! We love our children!" signs from the town instead of teaching their kids not to run into the road
You're obviously not a parent. If you were, you'd never make such a moronic statement. Kids do stupid things. You can teach your child not to run in the road - is that a guarantee that 100% of the time the lesson is going to stick?? Hell no!!!! That's why residential neighborhoods usually cap the speed limit at 25.
I don't see how filtering for linux is going to help. You're not very likely to find linux running in in a trailer park, folks.
Insightful, my ass. This article isn't for Joe Sixpack. It's for Linux users who want a filtering solution. If I'm a Linux user, and I want to apply net filtering for my kids, this is how I do it. Pretty simple logic, huh bubba??
Xenon, where's my money? -Borno
My wife (OMG, ./er who is married) calls these parents "Helicopter Parents" because they just hover over their kids, but as soon as there is an incident with regards to the child and the school and/or teacher, they immediately fly on in assuming that they (the school/teacher) are the cause of the "accident".
It's sad when my wife is surprised that the parent(s) supports the teacher's or school's position. She actually got offered $5k by a parent to pass her child so that they could get the kid out of the house (this was in the affluent Plano west high school). She turned it down which is probably why she's a teacher and I'm not...I'd take the $5k and still fail the dumba$$
"Look Lois, the two symbols of the Republican Party: an elephant, and a fat white guy who is threatened by change."
My proxy system enforces just a few basic rules:
I told her straight out, if you think a blocked site is legit, just tell me and I'll see about unblocking it. I have blocked a few fringe science, religion, and political web sites. When she refused to discuss the contents with me, I blocked the sites. I was perfectly willing to leave them unblocked, but only if she was willing to discuss them rationally with my wife or myself.
-- Will program for bandwidth
Not all parents want their children exposed to everything on the Internet, especially porn.
I find it strange that porn is the only content to be avoided that is explicitly mentioned by the story submitter and many comments. There are lots of things in the Internet that would be way more disturbing for children than porn, such as very extreme violence. Until that kind of content can be filtered I wouldn't even start thinking about filtering porn.
-- Repeat with me: "There is no right to profits".
The fundamental flaw with this ... is the notion that kids under the age of 13 or so should be left alone to browse the net.
Fully agree...
My 8-year old has a list of bookmarks for sites that he is allowed by me to access. Additions to the list are pre-screened by me, and I'm not afraid to tell him why something will not get on the list. I try to hide the Address box so that he can't type in URLs, but sometimes I do forget... Not that it much matters. I have his computer in plain sight of mine, and I watch him on the 'Net, if I am not interacting with him at the time. I also monitor TV usage, friends that he plays with, etc...
Don't get me wrong, I'm not micro-managing him, nor am I always in his face. He has my trust and confidence to make a decision on his own. If I feel he makes the wrong one, I try to educate and guide him, and discipline if necessary.
This software should make Linux a more viable option for families, but parents need to remember that no software is a substitute for watching what their kids are doing online in person. That's really the only sure-fire way that no objectionable material gets into children's hands.
Of course, that's difficult to do in practice, especially with latchkey kids. That's why teaching responsibility on the Internet is more effective than just installing a web filter.
However, this could be used by corperations to keep their employees on task instead of goofing off on the Internet, too. Not sure if that's a good thing or not. However, it is probably a more useful application of the software than using it as a net nanny.
Haec merda tauri est. Ceterum censeo Carthaginem esse delendam.
I have used dansguardian on ipcop for several different sites (schools, homes etc), and have been please by the relative ease of installing (as far as linux stuff goes) and the configuration options.
I have used IPCOP v 1.2 and 1.3 w/o any problems. Sidenote :it runs well on an older pentium 133 box.
Oh yeah, here
I think the sign will make a small difference. I, personally have no qualms about doing 80 in a 65 if that matches the flow of traffic (living in Phoenix, this is a fact of life). Even at lower speeds, it's common for most drivers to "bend" the speed limit by 5 mph or so. If I know I'm in a residential neighborhood, and I'm aware that there are kids playing, (school zone, etc) I'm more apt to keep to the letter of the speed limit. More signs certainly not a "catch-all". If a jerk wants to fly through a school zone at 45, a sign isn't going to stop him. But I do believe that it does slow down a percentage of drivers (especially parents).
Xenon, where's my money? -Borno
Well, I am a parent and the reasons are not always what you'd think. First, note that my 3 year-old doesn't do any more with our computers than type his name and those of his friends (hey, it makes him happy
That said, children vary in their responses to different things. I tried watching Miyazaki's Spirited Away with him. Yeah, I read the "scary for kids" warning, but I figured I'd gauge his response to it. He was terrified. By what you ask? The scene where the child's parents turn into pigs. He's not afraid of pigs, he thinks they're funny. But he was terrified that his mother and I might turn into pigs like in the movie. Make sense? No, but he's three years old!
In real life, we already have issues with him being influenced by kids whose parents (if you can call them that) apparently have wildly different ideas about childrearing than we. So he already knows a few words he we don't want him using and has made a few statements that would be pretty nerve-wracking if he actually knew what they meant. We can handle stuff like this because it's out front. If he were learning this stuff online it would be much more difficult to figure out the source and decide how to handle it.
Most parents' response to the net is similar to how they view books or movies: I don't want my son watching "Saving Private Ryan" for quite a while because I know how many nightmares he'll have. But if he happens to see the occasional bare tit on TV, no big deal. He'll just giggle and forget about it.
The fundamental issue is that of not exposing a child to material that he's not yet ready for. And this decision should rest solely with the parent. Our job's hard enough as it is; for those who want to use it, filtering is just one more tool.
I've been using DansGaurdian for a year or so now (what's good for my kids is good for me, I figure...) Anyway, it blocked access to these very comments (see below). Irony.
/ 15 48255&mode=thread&tid=126&tid=153&tid=95&tid=99&th reshold=2 ... has been denied for the following reason:
ACCESS HAS BEEN DENIED -
Access to the page:
http://yro.slashdot.org/article.pl?sid=04/07/01
Weighted phrase limit exceeded.
Your monitor is staring at you.
That said, I can see parents getting annoyed when they have to fight a constant rear-guard action against smut, violence, and what-have-you everywhere. Despite what your parents tell you, it is undeniable that what the kids see around them is what they accept as normal. So parents do have a legitimate interest in public debate over what types of material are appropriate for public places / airwaves. And especially over how much of their own social/political philosophy teachers should be allowed to preach in classrooms.
There is an argument to be made between community standards, especially with respect to media which is so easy to see (often impossible not to see), and 1st amendment rights. Speech is protected, but
Long ago my parents where visiting friends, I was bored and checked tv to watch cartoons.
(I was 10/11 by then)
I turned on tv and saw porn.
-- Frank Anemaet irc.freenode.net frank
Most of the posters seem to be parents here, so I'll give another perspective - the childs. I'm nearly 17, and I've had fairly unrestricted access to the internet for, hmm, probably about 5 years and used it a little before then. I've read and seen things on the internet that could be grouped into pretty much every category conceivable, and guess what? It hasn't done me any harm at all. In fact, I'd agree with the people who say it prepares you for the real world that little bit more. I don't have urges to rip my ass cheeks apart, drive around in a bangbus, or hate black people. My parents set a few (fairly unrestrictive) rules about my internet usage, and as long as I behave in a reasonably acceptable way in general, they won't have any reason to look at internet usage or anything else.
hell no, i would *ask* my children for drugs!
"ok, daddy, the first one is free..."
I have discovered a truly remarkable sig which this 120 chars is too small to contain.
My kids browse the web by telnetting to port 80 from my model 33 teletype. What am I supposed to be filtering out?
You let your daughter go the Barbie site? Shudder Yeurgh. The poor girl, she'll grow up all twisted.
I can't believe this is the same slashdot crowd that flames every other attempt at even the slightest application of censorship. (And, just a little while ago, was comparing their favorite pr0n mags)...
:) ). (So flame on :) )....
What's the point of all this? Explain to me, logically, how blocking the real world from a child is going to help him or her become more mature and prepared to deal with the same real world later on? Exactly what "mind warping" are you all so afraid of?
Come on, think about it...they can't stay in your little plastic bubble forever. All you're doing is stunting their mental growth (no pun intended).
Face it. The world is the world. You can't change that, no one can. Don't think about "protecting" them...think about preparing them. How are they ever going to become independent if you are working to prolong dependence and naivete?
I know I'll probably get modded troll for this, but it's an honest question: why censorship? What good, specifically, does it do?
Besides, unless you've seriosly locked down your machine (read: padlock+ ), it's pretty trivial to bypass these little pieces of software... Knoppix CD, anyone?
Even if they aren't able to bypass it (say you've set up a Fort Knox of padlocks, bios passwords, bootloader passwords, system passwords, filtering at the gateway, filtering off-site, etc), it's only a matter of time before they try looking for the same stuff on a different, less "protected" computer. And thus, they just will become resentful towards you....
Just my $0.02
(And no, I'm not a parent