JavaScript User Prohibitions Are Like Content DRM, But Even Less Effective (teleread.com)
Robotech_Master writes: It always puzzles me whenever I run across a post somewhere that uses JavaScript to try to prevent me from copying and pasting text, or even viewing the source. These measures are simple enough to bypass just by disabling JavaScript in my browser. It seems like these measures are very similar to the DRM publishers insist on slapping onto e-books and movie discs—easy to defeat, but they just keep throwing them on anyway because they might inconvenience a few people.
Nobody expects a "No Trespassing" sign to stop anybody from really doing anything they shouldn't, heck, you shouldn't expect your home locks to stop a burglar, and no, nobody thinks a "No Guns allowed" sign stops anybody with firearms.
But once you say "Stop, don't do it" then anybody making the effort to continue, no matter how trivial, has made an intentional action on their part.
I think you underestimate how many people this sort of thing stops. Yeah, it won't stop most techheads, but the inconvenience is enough to stop most people. Hell, most people don't even know you can turn off javascript. Most people don't even know what javascript is.
That's sufficient for their purposes, really. They can't stop everyone, no system is perfect, its enough for them to minimize it.