I don't think soundproofing would be an option for any tenant. You'd
virtually have to call in the Jet Propulsion Labratory (JPL) to entirely
shield you from most of these sound systems.

Fighting fire, with fire (Playing your system when you think they're
asleep) taking up Drums, Bass Guitar, etc, generally doesn't work, and
the tables may turn, and someone will drop a dime on you.

As I said, an anonymous "dime" dropped can sometimes work wonders. If
you're confronted about dropping the dime, play dumb like Sgt. Shultz.
Never admit it was you. Mark