http://www.snopes.com/Is pretty much the definative resource for all those people who send around "My friend smelled this perfume and got robbed" or "It's true this happened to a friend of mine, they went to a Chippendales show and etc."
Had to print out the perfume one to show a policeman the error of his ways when he sent it as a serious security warning to everyone at my works
Who'd have thought that "Ring 'o' Roses" is not about the Black Death after all? (Pity they don't have the myth that Fleming discovered Penicillin on there).