I'd also like to add another means for revenge. Spike their tea. It'd be hysterical! Make peach tea or something. Say that you didn't have anything else! Put some flavored rum in it so they'll hardly notice a thing...until they're blitzed. Take all their keys and leave them all at the theater to perish.

At the very least, you could drink the rummy tea yourself and you won't give a shit about them any longer.