Normally I'd say good idea just for teh lulz, unless they're being indirect because YOU are the "other party".
Pouring maple syrup into the driver's seat of your obnoxious neighbor's/roommate's/coworker's/fellow student's car when they aren't around.
We'll murder them all, amid laughter and merriment...except for the few we take home to experiment!
"I cant see S***! --YOU GO TO HELL!" --Tourettes guy