My neighbor problems might just have sorted themselves out. It's been quiet over there the past two days or so, until I got woken up at midnight to someone shouting about the place being trashed. Looks like the parents finally came home, unexpectedly at that.
I tried to spy out the window the best I could without being seen, and I think I saw all of them leave. Here's hoping they're going to stay with grandparents or someone else from now on, while the parents are gone.