Here's a site I found during my daily random search for trivia questions. It's called wronganswers.com. The site is "dedicated to the proof of the proper role of WWW in research," and it does a fair job of fulfilling said mission.
It isn't the most professional site in cyberspace, but the concept is clever. Users provide made-up facts, which eliminates the need for verification of any kind. I suppose if the answers were dependably wrong, such consistency would undermine the site's integrity as an unreliable source. Information proven untrue can at least be helpful. Uncertain veracity is far more dangerous, and I think that's the whole point.
Anyway, my favorite wrong answer so far is under the Law & Politics section. One user defined Habeas Corpus as Latin for "She got a body on her!" They're not all that funny, but I laughed out loud on that one.
P.S. The site also has a string of relatively funny fake banner ads. I'm sure they're done by some other third party, but one new site at a time.