This post at Doghouse Diaries suggests some minor but extremely annoying things one might wish did happen to their enemies, as a way of obtaining revenge. They're along the lines of some ideas I remember reading in a book called Throw a Tomato, which described more than 150 ways of being "mean and nasty." The one that sticks out in my mind is the suggestion to "salt the Band-Aids."
But the Diaries post goes too far in once instance. Nobody should have their inner voice be that of Gilbert Gottfried. Not even Harry Reid, but in his case it's because Gottfried would be a step up from the dingy gray smear that usually rings in his empty, dingy gray skull.