Does the broken windows theory hold online?

http://www.kottke.org/08/12/does-the-broken-windows-theory-hold-online

Much of the tone of discourse online is governed by the level of moderation and to what extent people are encouraged to “own” their words. When forums, message boards, and blog comment threads with more than a handful of participants are unmoderated, bad behavior follows. The appearance of one troll encourages others. Undeleted hateful or ad hominem comments are an indication that that sort of thing is allowable behavior and encourages more of the same.