they still gotta live next to each other after that shit happens though. best to do it under cover of darkness, from about 50 yards away, unseen. prank them into moving out, instead of giving them a target for retaliation.
this comes as a double-win. make life for them so bad that they decide to move. then whenever someone's viewing the property as a potential buyer, prank them too. drive the price down on the property until the family can pool funds and buy it back.
then next year when taxes come out, everyone will start getting that money back in the form of depressed assessment values for that one low-price sale.