- Banging on the ceiling (it worked once, but not today).
- Taking up a pair of dollar-store headphones and asking them to use them.
- [almost everything else I thought up off the top of my head isn't legal]
I get the impression they aren't terribly concerned about being considerate neighbors since they put their trash under the stairs between trash days (a $50 fine if management sees it) and drink light beer like it's going out of fashion. (They put out an empty 24-pack box and a couple grocery bags of empty cans every Monday.)
I don't want to blast anything without direction in here because our downstairs neighbors are nice, so I'm thinking about taping some speakers to the ceiling and randomizing a wake-up call (only at legal hours, of course) with something sufficiently annoying. Based on their generic merkin rock blaring, I think just about anything I listen to should annoy them. I'm thinking... numbers stations. Ne?