People that buy used stuff on Amazon without reading the product description/condition note. I sold a used PS2 that has some problems reading discs, as it was clearly described on Amazon. Some person bought it, I shipped it out, and today I received a message that it doesn't play some games and they demand a refund. Idiot. If I could carelessly use my credit card like that, I would just buy a new one.
I offered to give a partial refund because shipping credit was nowhere near enough for the actual shipping cost. Haven't gotten a reply yet, but I have a feeling it's not gonna be good.