Wow. I wish that I could say that I was surprised, but after renting the upstairs of a house and having the downstairs tenant insisting having the heater at ludicrous levels and talking about nearly freezing to death while I was baking and had big boxes over every heater vent... then I found out it was because they left the window open and never thought to check. This was after a month, in November.
After that, no example of human stupidity will surprise me. Or at least that's what I want to believe.
When I was a kid, I liked getting rare denominations like both kinds of dollar coins, 2 dollar bills, and even had some old coins like the nickel one cent coins.