Years ago we were in a duplex with neighbors who were noisy...they had little lowered cars that they liked to rev (seriously, revving a 4-banger on a Tracker and a Cavalier is just sad, people). They also liked to play their thumping bass music in the wee hours. We were suspicious that they'd be trouble when our landlord was showing them the unit and they arrived with their vehicles with big stickers that said "Baby Boom" across the top of the windshield.

What made matters worse is that this couple had a little boy...couldn't have been more than 2.5. They would drive around with him STANDING on the front passenger floor. We should have called CPS.

Fortunately they only lived there for a few months. Apparently they stopped payment on their 2nd or 3rd month's rent, so they were evicted. Phew!