This is a tricky one. You need to balance your perfectly justified feelings of hurt and anger against the harm you will do to innocent parties, in order to exact your revenge. My instinct would be to do nothing. I have been in your situation, and schemed for months how to get my revenge, but looking back, the cost to my dignity would have been greater than any satisfaction I may have had in spoiling other peoples' lives, together with the knowledge that I would be seen to be vengeful, an unattractive personality trait, however justified. My advice is to leave well alone - these things have a way of coming round, and you may find that ' revenge' can be obtained without direct action, and it will be all the sweeter for that.