Its not worth it.

  1. They don’t care about you, hence it doesn’t affect much if you plan to take revenge by inciting jealousy etc.
  2. If you are planning a ‘make over’ induced rebound love i.e. getting sexy and then re-enticing them, again not worth it. It wastes your time and shall not change them. Ever body has some basic tendencies or what we all ‘criterion values’. They cannot be changed easily. This is just like biting a venomous snake with deadlier poison. You have to become a snake for it and for the snake its just normal fight!
  3. Best approach is to improve yourself and learn methods to avoid such encounters in future.