Exactly my point, on why it's just much better to let it go, move on and win the wife a thousand fold over, rather than waste time stooping to the offending guy's level. Those little pranks will never sum up to the amount of hurt he caused you. In hindsight you might actually feel that what pranks you came up with, was never enough, and you'll probably want more, until it gets really bad.
If he finds out about the pranks, he might find a way to get back and deal more damage. Close the door and prevent another incident from ruining your family.