I got one of those a while back, I saw a cop fly up behind me so I changed lanes to get out of the way as I wasnt doing anything wrong just figured he needed to get somewhere and he said I was too close to the car in front of me and almost caused an accident. I asked how close is too close he didnt give me a number just that I almost caused an accident. I said well I dont really see a gray area just either i did or did not cause an accident and he said well thats my opinion. I just laughed and paid it.