I'm sure I'll hear about some people, and read about it in the paper. One of my friends (age 16) was in his truck behind a cop, and the cop did a U-turn and flipped his lights on. He was going the speed limit and everything, but the cop came up and thought he had been drinking. He didn't get anything, and I'm wondering if the police were just being ambitious pulling random people over, along with the drunk ones.
It's always possible. If there's heavy drinking going on, then the cops will pull over anyone they think is being suspicious. Better to be safe than sorry.