In a situation like this, you learn your lesson and move on.
Let people know "Beware" of this person. If you try to get back at these kind of people, then your lowering yourself to there level. If you do get back at them, you could be putting yourself and family in danger.
I don't believe in karma, but I do believe these kinds of people seem to get what they deserve!
Or is this the definition of karma?
Regards
Jeff