warning: long story.
This one dates back a way to the late 1990s. A friend of mine had a small flat as accommodation, partly subsidized by the university he studied at. There were about 20 flats at this location, and they were built in pairs, so everyone shared a wall and roof with their neighbor.
My friend’s neighbor was a mess of a kid I’ll call M who came into second year uni having barely scraped through the first and spent just about all his available time with loud music, smoking, and getting drunk with friends over.