I have a friend that had some rough Scottish neighbors once who loved to get in clan wars like this.
Ask them to turn down the stereo and they'd throw an all night party...
Tell their kids to stay off your lawn and they'd put a flaming bag of poo on your porch...
Talk to their Mom about any of it and she'd kick your a$$ without breaking a sweat and a cigarette hanging off her lip...
Call the Police on them and the next day they'd accuse you of touching them in their private areas...
My serious advice is to just burn their house down and get it over with.
ha!!!