OP: Headphones. Headphones? HEADPHONES!
(...yeah, they're annoying and don't sound the best sometimes, but hey, they solve most of the issues we all have...there are dozens of good headphone amps with built in drum machines, loopers, etc, that can be fabulous practice tools as well, I've got a 10+ year old Korg Pandora, and still use it daily!)
Been there, done that, got the t-shirt, starred in the video.
Late 90's, an apartment just off campus from LSU in Baton Rouge, LA, punk-@$$ videogame/(c)rap fan/idiot next door, wife who had to be up at 6 am every day to be at work.
Punk-@$$ liked to listen to his Tupac and blare his videogame audio at 11 (hey, it's one louder!) until 2-3 am every day.
I knocked on his door and politely asked him to respect others and the lives they have to lead at least 3 times. No joy, blew me off with the "yeah dude, whatever, your wife will just have to suck it up..." reply.
Then I told him, firmly, that he would need to grow up and learn to respect others or suffer the eventual consequences. Fell on deaf ears.
Followed "procedure", went to the apartment manager (mind you, this was a NICE complex, not some fleabag), stated my case, was told "we will look into this and address it appropriately." Translation: "I'm not getting my fat, lazy @$$ out of the chair behind my desk in this nice a/c'd office". Three complaints, in writing, hand delivered - ignored.
So...
...Peavey T-Max head (500 watts @ 4 ohms), two Peavey 410txf 8 ohm cabs (4 ohms total load); cabs placed with speakers AGAINST punk@$$es wall, amp turned up to 10 - both pre and master gain; nice 6 string bass with a very solid B string, right thumb on open B string. Wait for the first "boomboomboom" of Tupac, pound on open B string for 30 seconds, wait, hear the sound of things breaking next door, pound on B string an additional 30 seconds, hear MORE stuff falling off wall.
Turn off amp.
Go outside, sit in nice comfy chair on front porch, pop open beer, smile, and LAUGH at moron when he comes out looking all confused.
"Next time, dip$417, don't bring a knife to a gun fight, hmmkay?"
Got really pleasant around there in the evenings afterward.