You will get no sympathy from the judge for telling the guy off. Plus if he does not show up I believe they don't have to throw it out. They still have evidence which is the reading from his gun.
One thing to do when being stopped, is turn the engine off take the keys out of the ignition place them on the dashboard. Then make sure both hands are on the wheel, and always make sure to get registration/insurance only when he asks for it. I have seen cops let you go with a warning for doing this.
