Some guy at our tourny sat on his deck, some of the cards just shot out but about five were bent in half. He set it down beside him during a trade and was asked to move over and he moved to the chair. His Rayquaza * was pretty bad condition after that, but he still wont trade it. Recently someone tossed thier deck in the garbage by accident, he got it back but that was close.
As for myself, back in base set, when it was worth so much, I had a raichu in my hoody pocket and it was severed down the middle after a football game in a park. That sucked cause I had trade plans for it too.
Seems people do some stupid things, And Im no exception.