I used to have a neighbour from hell who would constantly throw parties, play her piano for hours at a time past 6pm, coupled with loud stomping and singing, and generally just be a total cunt to listen to. She was so horrible and unreceptive to all of us living in the block so there was no peace to be made with her. We put a speaker to the ceiling whenever she "practiced" late at night blasting the most earth shattering bass to fuck her off. We'd leave the speaker on in the morning when we went to work because we knew she'd be hungover and it drove her nuts. I had a broom on stand bye to jab at the ceiling with whenever she slammed doors. It was fucking petty but my god, it was hilarious hearing her throw a tantrum out her open window about us "bullying" her. I've always been considerate of my noise for my neighbours except for her. She fucking deserved it.