I had an upstairs neighbor in a previous address terrorizing me. Legit would blame my roommate and I for smoking even when we weren't there. He did things like super glue our locks, pour bleach from his apartment into ours, slash the tires of our cars.

Aside from the landlord who "couldn't do anything" (side note: pretty sure they were in cahoots with each other to increase turnover on a rent stabilized unit), the police literally looked at a video of him gluing our locks and said "we can't do anything."

I hate the world.