Maybe I’m just biased, but I think that Wikipedia is a god-awful place for any intellectual discussion. Corrupt and incompetent admins will try to shut out a lot of opinions that diverge from theirs via stupid rules and such. The majority of the active editors are intellectually both dishonest and immature. Not only that, but the overt egalitarianism and consensus-based editing system reminds me far too much of democracy, including the presence of a clear oligarchy of unscrupulous and non-disinterested editors. See this discussion here below for a little more about it.
On the other hand, vandalism of articles is pretty loltastic.