I got pulled over yesterday while driving my parents' Model S! I was stopped at a traffic light and not even moving. The official reason the officer told me he pulled me over was that he couldn't read the temporary California sticker that Tesla had mounted in the rear windshield until the plates come. But I'm skeptical that was the reason. He didn't even ask for license and registration. Instead he just asked a few questions about the car itself and sent me on my way - but kept following me until I reached my destination and parked. The delay almost caused me to miss my train.