And when you do complain to/about neighbors, I've found it helps to have a copy of the lease handy to point out what part of the lease is being violated.
It helps even more to have a sound system that cranks up to eleven. :-)
When they tick you off... you shake some books out of their bookcase... make the silverware rattle in the drawer... that sort of thing. :-) Not that I would ever do this. I'm just saying...