Some of the revenge things I did was
*told her BS
*destroyed anything he had in his apartment that I provided
*spread his expensive toothpaste over every mirror, bathtub, floor etc
*melted his plastic bowls just enough so they leak.
*turned his heat up to 90 and his H20 heater off
*took his computer, left his monitor and keyboard
*made it so that the drawers of his dresser fell out when he pulled on them
*hide the mates to his socks (expensive socks too)
*took his spoons and forks. Left the butter knifes
*took all his stuff out of the freezer/fridge. Left on the counter w/heat on high
*smeared Vaseline on every door knob, drawer, cabinet and tv knobs too
*borrowed the batteries out of all his remotes.
*borrowed the charger to his xbox controller
*cancelled his cell number and made it so he couldn't turn it back on
*Took his cell phone back (I paid the bill)
*Took the oldest car we had and made him drive it, while my 16 year old drove the newer car (his)
Did it make me feel better? hell yes
Did it resolve anything? Nope, but again, I felt better - it got my point across & scared the hell out of his AP.