Having had some experience in being accused of certain indiscretions, with no proof other than my being in the wrong place at the wrong time, (on several occasions), I was once referred to as one of "the usual suspects" If something was afoot, I was not far from mind.
Then they came out with a movie of the same name, (and I was no where near the place and never heard of em). One of my friends called me Kaiser and it took a long time to figure out what he meant. I saw the movie, and remembered the reference and there it is.
(BTW it was never anything really bad, just a basic Pain in the ... !)