This thread reminded me of something similar in my (ahem) checkered past.
Where I did live, the landlord also owned the house next to me. The first year or so an older couple lived there and they were great neighbors. Minded their own business and if they ever complained to the landlord he never mentioned it. But they moved and both his daughters took up that residence. That's when the fun started. I went to work most mornings on my Harley leaving at 4-4:30 a.m. They mentioned the straight pipes to Daddy.
Within a month or two they started having loud parties with many guests until 2 or 3-3:30 in the morning. Every night. I finally got tired of walking around in my sleep most of the time. Went over, introduced myself and ask if they could turn the stereo down after 10 p.m. I got a very unlady-like reply. The parties got louder if anything.
Enough.
I spoke to the landlord who told me to handle it anyway I wanted short of gunplay or arson. I Invited a few club brothers over to live for a while. First night they invited themselves to that party. And those guys knew how to really party.
They cried to Daddy.
He laughed at them. He told me he had let them live there to get them out of his house, but they had never paid a red cent or even any utilities. Since I paid every month he didn't care what I did.
Don't know just what happened over there, but the loud thumping music quit. My brothers moved out. Life was good.