State Troopers here might pull you over and give a warning for mud flap requirement. The city cops wouldn't do anything if they seen it, knowing if they need an ace in the hole to pull you over someday if they suspect DUI, they'll use it for that, but not ticket you for it. Cops around here let things slide all the time, just so they have something to use in the event they suspect something else. People drive around with fog lights on all the time, with no problem. Coming home at 3am, and your fog lights are on, you're getting pulled over. Just to see if you might have been drinking.