At 2:40 p.m., my kitten noticed a noise. I didn't think much of it until I realized it's coming from the bathroom. It's not in my apartment; it's coming from the Pantry Punishers' bathroom. One of their children is fond of pounding on the wall now.
It's not a constant noise, yet. But when neighbors' kids start bothering their neighbors, it's only a matter of time before it gets worse.
Oh, and FBPD? Since my kitten heard the sound, it's obvious that I'm not "hearing things that aren't there". The sounds are real, since they were observed by another living being. Which means the noises are real. And since they're real, they're punishable by law.