In the Pittsburgh area there was a particular patrolman in the southern suburb of Mt. Lebanon who was infamous in that area for picking on antique car violations. He is the guy who tagged an acquaintance of mine for hauling a picnic table in the bed of his antique registered '66 Ford pickup, which cost him over $600.00 20+ years ago.
I also knew a guy with a street rod who got pulled over for hauling a picnic cooler in his roadster/pickup's bed. The cooler was even painted to match the truck! The only reason he got off on that one was because he opened the cooler and showed the cop his lunch!
Personally I try never to give a jerk an excuse to reveal himself.