The high school I went to was pretty interesting. They were in a room that was never locked. Kids used to go down there and make out and stuff, and the student activities department stored all kinds of junk in the room. It was the only part of the basement that had a really, really reliable sump pump, so people always put stuff there to ensure that it stayed dry. I can count on one hand the number of people who actually knew what these were, as well as the dangers associated with them.