cop tried to defect me once when I was driving a car between workshops with a tradeplate on.
he argued black and blue that he could do it.
took the notice into his station, spoke to his supervisor and found out the guy was a rookie and had the fine cancelled.
just as well, the car I was driving had a topmount td06-18G (or something like that), rollcage, no front bumper, hood or fenders, or a passenger side door from memory.