In Arizona people done even put their lights on. It amazes me. I know some of the cars are just that bad they probably don't have lights, but most of the time its just people driving thinking they are on but its just their parking lights or they DRL's. Its ridiculous to me. I remember when I first moved here I was talking to my friends parents and they said gangs used to drive around like that and when you flashed at them they would turn around and shoot at your car as an initiation into the gang.
Anyway, I try to check mine every few days by using reflections in windows or other cars.