I don't believe it to be a revenue making subject, but it does give them probable cause to pull you over. I have had warnings in Denton and near Wylie, so I don't know if target location is an issue either. What I do know is, that I see alot without 'em. I didn't know the fine was $100 or so... that might get a pie pan stuck on the front of mine if that's the case. Now if I can just find the damn thing.