I've never been pulled over as the driver. It's happened twice when I was a passenger, though. First time was when I was really young, a cop pulled us over while we were out of state for speeding. According to my dad, who was quite livid about the entire thing, he was somehow able to successfully contest it and got out of paying.
The second was when we were carpooling back from an anime convention late at night. our driver had been having problems with either her taillights or the light for the license tag, so a campus police officer pulled us over, told her to get the light fixed, and proceeded to ask in bewildered amazement about what we were wearing. So we had to describe the whole anime convention and cosplay thing to him lol