Paul Weigand of Kansas argued with the court that the state statute requiring people to wear seat belts while riding in a car didn't specifically assert that the seat belt (not pictured) had to be attached to the vehicle in question:
An officer ticketed Paul Weigand during a winter traffic stop after making him get out of his car to prove the belt wasn’t connected to the vehicle. Weigand says he is terrified of becoming trapped in a burning vehicle. Plus, he says the law doesn’t specify that the seat belt has to be attached to his vehicle.
The judge disagreed and levied him a fine and court costs.
http://www.kansascity.com/2011/02/10/2646775/kansas-judge-says-homemade-seat.html?story_link=email_msg# via Lowering the Bar | Photo (unrelated) via Instructables