There is an elevator between our apartments. I don't know if that makes things better or worse. I never hear elevator noise, though.
These are the people who couldn't hear me knocking on their door to turn down the music, yes. I hate being the cranky neighbor yelling about "you kids, turn the music down!" if only because it makes me feel older than dirt...
Maybe if I bought them a one-way ticket to Manchester? Maybe if I rigged up a Dune-style 'thumper' and strapped it to my side of our adjoining speaker-wall to set up a counterpoint - for best effect I'd have to attach some kind of randomizer, wouldn't want it to sound like a regular beat, now...
thumpthumpTHUMPthumpthump thumpthumpTHUMPthumpthump THUMPTHUMPTHUMPthumpthump
There are good reasons why I don't own firearms. I would be entirely too tempted to apply them to situations to which they are not warranted.