Here's mine: Back in like 2006 when I was in college and they first released games on facebook, there was a game my friends liked that was multiple choice, matc

Here's mine: Back in like 2006 when I was in college and they first released games on facebook, there was a game my friends liked that was multiple choice, matching song lyrics to artists (if I remember correctly). It was always four choices, you would get points for a correct answer and not lose any for an incorrect answer, then there was a leaderboard amongst your friends. So I thought clearly the right way to win this game is to write a program that just chooses randomly (actually I think it just always chose the first choice), but as quickly as the server will allow. My poor friends woke up the next morning to find I had about 1000x their points. A fun hack, but I also regret it because it ruined a fun game for me and my friends; I couldn't figure out how to reset my score.