Here is a good one... from my driver’s ed teacher:

“The police legally CANNOT give you a ticket, unless their car is marked with their standard issue colors. Around here, the city and state police have black and white cars. Sometimes the highway patrol uses all-white cars to blend in, but this isn’t legal. If they do that, they are supposed to pull you over and call in a black-and-white to write the ticket. If they don’t, the traffic court judge has to drop the ticket.”

I have no idea where this idea came from, but it is truly bizarre.