I had considered this kind of situation, and thought about using audio exciters
https://www.daytonaudio.com/topic/excitersbuyerguide
attach one to outside of window(s) and play really random creapy stuff to make the squaters think the house was haunted, so they would not want to stay.
Screams, gunshots, breaking glass, cat fights, barking dogs, sirens sounds etc that would randomly play at a really loud volume all day and night
That’s cool!