Small town cop wrote me up for 83 in a 75 (I-20), even though I was doing 75 on cruise and GPS. He, and the Judge, said "GPS just isn't that accurate". How do you reason with people like that? Still pisses me off.
Just looking for revenue. Many years ago I had a back woods sheriff's deputy give me a ticket that wasn't warranted either. When I said something about it he laughed, noted I was 500 miles from home and doubted I would show up in court to fight it.