I have lived to one of the worst people on Planet Earth. He is the Gold Standard of bad neighbors. At least he's spending the rest of his life in prison for murdering his uncle/landlord now so he's never going to be my problem again.
One of my favorite stories was how he'd always come roaring through my front yard in his old Dodge Dart at 2 A.M. on his way home from the bars. He'd cut through my yard, and then hit his front porch with the car. Then he'd climb out and do a victory dance on the hood of that ugly green piece of shit like he'd just won the Daytona 500. He would run over my garbage cans if they were already out. One cold January morning I was leaving for work at 5:30 AM and one of my loyal beer drinking buddies was out in my car port filling a garbage can full of water. It was something like ten below for a couple of days after he filled the can with water and we just let it set there and freeze. We sat the can out for garbage day after hoisting a few brews in honor of our fiendish plot. Sure enough, a little after 2AM I hear the Dart winding up for final approach down the street. He had my trash can in his sights. I figure he was going almost 40 MPH when he hit it. The thing was frozen solid as a rock and probably weighed better than 500 pounds since it was a very large can. A large and beautiful can that was just way too tempting for Phil to ignore. It shoved the front of the Dart in to the point where the water pump and radiator were taken out. The car sat there in his front yard until the day they took him away to prison a couple of years later. He never said a word to me about it.
Then there was the time his naked wife beat him over the head with a car battery, or the time he thought I shot his dog, or the time he threatened to kill half the Sheriff's Department if we messed with his marijuana plants out behind the tool shed, or the time his wife had a gang bang going on in their living room and wouldn't give him a turn, it was always something with them.
OP, you've got no idea what a bad neighbor can do.