This didn't happen to me, but I witnessed it. I work in a large retail store, and today a guy came in with a fruitcake that was a year old. The fruitcake was old and hard, since it had gone past the expiration date, but the man thought that it would last 12 years because he didn't understand the expiration date when he bought it. It turns out it had gone bad after a few months or something and he was pissed. He starts yelling at the cashier (who didn't have anything to do with the original purchase) and demanding to see the manager. He's going on and on about this $10 fruitcake and how he is going to sue our store. I'm always extra courteous when I buy something at a store because I know how moronic and self-important some customers can be. It's like they just expect employees to bend over backwards for them.