Now that I've posted up an American flag on the back of the car, I've never been stopped by a cop. My point, you'll be less likely to be stopped if you have some kind of patrotic sticker on the the back of your car or a patrotic bumper sticker(like those support the troop stickers). I know this is sad, but whatever it takes not to draw attention, right? And if a cop stops you, he'll already have a favorable impression of you.