Wikis are stagnant, low-productive, and new-user unfriendly - yes. I don't think this is entirely the doing of trolls..
places like gww are impenetrable for new users because of the amount of wikilawyering which has lead to some pretty complex and weird guildline infrastructure (e.g., don't post on the community relations talk page, retagging pages tagged for deletion with a slightly different deletion tag). A lot of this is the result of dealing people who lack common sense, the kind of people who, by contributing, reduce productivity. Are they trolls? well, not really, they're just really fucking retarded people (i can give you the example of gww:User:Ariyen).
Trolls are sometimes unproductive but they aren't entirely the problem - those with hypersensitivity to trolling can often be much worse than the trolls themselves. 188.8.131.52 16:43, May 31, 2010 (UTC)