Once I got an assignment from a teacher based on one of the massacre's during Vietnam, I can't remember what it was called as it was long ago. Well anyways, knowing that anyone who took his class had to do the assignment and would have to return the following day, I decided to do my own little bit of vandalizing. I looked up the massacre around 7:00 PM pacific and started editing some material like dates and names of locations, then at a few points I wrote in the teachers name randomly(as Mr. _____, not his actual full name). Needless to say I heard a couple rumblings the next day from people in his class about his name being on wiki, which afirmed to me that my vandalism worked. I only wish I could of seen some of the papers that were returned with the teacher saying "where the hell did you find this?".
I know I'm an a-hole, but I had to do it and it was just so easy, plus never use such an open source as final word.