A friend and I made a video of us having sex one night while we were really drunk. His roommate he moved out and after we left for dinner that evening, he came back and stole the tape but a few other things as well. Then he went around showing it to our friends. Everyone got on his case about it and told him he needed to give it back but he wouldn't.
Karma's a bitch, and the next year or so was rough on him. He had very expensive car repairs, health problems, IRS audit, lost his job, and one by one all of his friends turned their backs on him. He finally gave it back because his last remaining friend told him that bad shit was going to keep happening to him until he did the right thing, and then slapped him a few times to get his point across.
Mostly the sex tape came back to haunt him, not me. My friend and I had a wild night, but the thief had a long stretch of misery.