Start calling the police on them, anonymously. I've had trashy neighbors. Called on them for every little thing, every noise after 10PM, every note they left complaining about ON STREET, NON-ASSINGNED PARKING, every time they let their grass go uncut for a month, every time garbage of theirs got in someone elses yard (almost daily), every time their dog barked after 9 (local ordinance), when they didn't inspect their car (illegal to park on the street).Lies, so much drama going on over here. Why, just now I was staring at the wall imagining ways to annoy the neighbor demons.
Eventually they said screw it and moved into a trailer park.