I'm thinking of leaving trash on my neighbour's lawn.
Why would you do that?
I like the neighborhood and I like the area I live in and don't like it if strangers move here and go on wrecking havoc
Littering is wrong. It's not nice to make others pick up after yourself.
Who cares about nice, when you can get revenge? All they do is play loud music.
If loud music is what is upsetting you then you should politely ask them to turn it down. If they don't listen then you have within your right to call the police for a noise disturbance.