Really amused by the OP and all the effort, and then update two days later... "so, talked to him and it's no biggie, they'll just keep it off".
...pile-on aside though, I get it. You think neighbors doing obnoxious shit is "not caring" or they must be assholes, because it's so damn obvious. You might wonder why they're forcing you to say something... yet, it's usually because they're really ****ing oblivious.
Whether it's people leaving dogs outside to bark at all hours of the day or the old lady who stops in the middle of a busy section of a grocery store or the idiot who blocks everyone from getting off the elevator first or the dumbass driving 10mph under the speed limit in the fast lane.... they usually have no ****ing clue they're inconveniencing anyone, or at the very least play nice when you call them out on it.
And even that realization doesn't make it significantly less frustrating to deal with, but it's obviously better than spending $500 to fix an issue that a 3 minute conversation solves.