Been busted once or twice by mom, who was not pleased, but she got over it.
Here's a story of me busting someone else:
When I was in the Air Force, I lived in a dorm room on the base. I didn't have a roommate, but the bathroom was shared by the room next to mine. I didn't know the guy because he was in a different squadron and we never talked. One Saturday morning, I was on the phone with a friend when I hear the shower start up. No big deal, or so I thought. I heard two quiet voices coming from the shower and was hoping they were not going to do what I thought they were going to do...but they did.

Well, I decided to have a little fun with it...
I quickly fired up the computer and put in a Korn CD and played A.D.I.D.A.S. (For those non-Korn fans out there, it's an acronym meaning
All
Day
I Dream
About
Sex.) I turned it up loud enough to be sure they heard it over the shower and her moaning. By the time the song was over, she was out of the shower, dressed, and out the door. By the sound of it, she still had her fun out of it, but probably had it cut a bit short was all. A week later, the guy had moved out of the dorm, although I don't think it was related to the "shower incident".