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Infrequent Anonymous Cowards Reliable on Wikipedia
Hugh Pickens writes "Researchers at Dartmouth University have recently discovered that infrequent anonymous contributors, so called "Good Samaritans," are as reliable as registered users who update constantly and have a reputation to maintain. A graph from page 31 of the group's original paper (pdf file) shows that the quality of contributions of anonymous users goes down as the number of edits increases while quality goes up with the number of edits for registered users."
Doing such a study requires checkuser access, which is something only a few people on Wikipedia have. Fortunately, I am one of them. I just sampled ten users out of the new user log. I am assuming a 1:1 mapping between IP and user (that is, that a user made no anonymous edits except with the IP he used to register his account). The number of anonymous edits prior to registeration for each user was:
A - 0
B - 0
C - 0
D - 2
E - 0
F - 0
G - 0
H - 0
I - 0
J - 0
In short: most of the people registering accounts had made no edits prior to registering. It's common knowledge on Wikipedia that something like half of all accounts registered never make any edits at all, so this makes sense.
To make laws that man cannot, and will not obey, serves to bring all law into contempt.
--E.C. Stanton
You have described the dilemma of the Wikipedia editor/administrator.
There are edits that are obviously unhelpful; there are others that are clearly helpful. But there is a gray area of edits that falls in between, and for which editors' reactions vary a lot.
A good example is an anonymous/new editor adding unsourced information to a carefully-sourced Featured article. You can't let the information just remain there, as editors have gone through that page, double-checked the citations and validity of the statements, and generally polished the article to have its prose crisp and clean. But you cannot just revert the edit wholesale, as the edit was not done in bad faith. While sometimes the edits can be fixed, there are many times that the edits are incorrigible, and need to be completely reworked or removed (such as introducing widespread, irrelevant rumors on the biography of a celebrity).
So, at this time, some editors remove the text, with an explanation in the edit summary. Sometimes anonymous editors read the edit summaries, sometimes they don't. Often they wonder why their text got removed, justifiably so. Some users take that personally and begin accusing us of being "grammar Nazis", or even "suppressors of the truth" (I've heard that one before). But in a way, we're just trying to keep everything in order.
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