Way back in the day when I was an officer in the Canadian Armed Forces
I was given a staff car to drive from my place of work to the base, which was about a hundred miles away, and back. The car was painted black and had a white Armed Forces Logo on the doors. Late at night to drunk teenagers doing 80 mph in a 60 zone those decals looked a lot like police decals. It was great fun to sit at an intersection and watch as the drunk teens piled on the brakes trying to get down to speed limit before I caught them and gave them a ticket.