When I was in university one of my friends tried to win a bet at a bar by editing a Wikipedia page to add the outrageous claim he made. At first my trust in Wikipedia increased because it got removed in less then an hour. The next day it decreased, because he registered a free blog account, published one post with his outrageous claim in it (and basically nothing else), then edited Wikipedia again adding the blog as a source. That edit stayed up for years. He still tells that story when drinking with friends...
