Although it is family in a way One way to get back is a sprayer full of roundup when they aren't around. They won't know what happened but it will at least make you feel good in the mean time. And if you don't have a signed contract then going to court is useless because its all word of mouth and besides it will cost more then its for. The sprayer works pretty good for me, I've made a couple of late night visits to people who have screwed me out of money and thats when I was doing them a favor in the first place by cutting them an awesome deal. They didn't like the word "***" mysterously appearing in the middle of their grass but "I don't know how it got there"