Years ago(before MMOs were all big and popular) I heard a story of a man who played an MMO. It was the type with open pvp. Someone could start attacking you whenever, and then take whatever you have if you died. He had spent a long time saving up on his money, and then one day someone came up and killed him and took all of his money. He killed himself for it.
http://www.foxnews.com/story/0,2933,195236,00.html
http://www.cbsnews.com/stories/2002/...in525965.shtml
Then I've seen a video of a kid attempting suicide over a game, he didn't die, but I'm not going to post the link.