Techno music.

I'm no big fan of techno music. It's no music you can listen to. No music you can dance on, either.
I remember that i used techno music in order to illustrate a (porn) movie i edited, when i was at university.
Apart from that, techno music has always been associated to a bad memory.
I had neighbours (students) listening to techno music as loud as possible. Several times a week. Day and night.
We tried to bring them back to their senses, asked them to lower the sound. They kept saying music helped them to relax.
We called the police...who did nothing.
After months we found THE solution.
Those students lived in the flat below ours. We decided to turn our music on around 3-4 am while they were certainly asleep.
The trick is that we lengthened the speakers in a way that the sound was directly steered towards the ground. Only our victims could hear it.
We had to do this three times...only. Never after they bothered us, in a way or another.