Many years ago when I lived in a high-rise block of flats it was a regular issue(as you can imagine) I went to a flat above me ( not even directly above, just on the next floor) and asked them as politely as possible to please turn it down as it was 3am and I'd had enough. Got told "yeah yeah sorry mate we will " I went back to bed and they had actually turned it off but only for approx 10 minutes before it was blasting out again and they even had the cheek to shout out of the window insults at me "loud enough for you knob" etc I went back up there, opened the meter cupboard outside their door and yanked the 100amp fuse out and legged it back downstairs They had no idea what flat I was in so was sod all they could do. I gave it a wipe over to remove prints and left it on their doorstop on my way to work in the morning When the lockdowns over we can all bring our bikes round to yours for a long day of exhaust testing