I moved into a house in college with a bunch of strangers. They were all delighted to have me there because the guy I replaced was a nightmare roomate. At the top of a long list of weirdness this exroomate kept a "$hit dagger" on top of the single toilet in the house which he used to chop his turds into flushable size. This dagger was always there on the toilet even though everyone asked him to hide it or keep it in his space. Like most weirdos, he had no idea how weird he actually was and thought he was being funny.