One or two cars going through a checkpoint not showing ID isnt going to do much, but if you could get regular joe six pack types, moms, grandmas, etc and other "normal" people to line up 50 cars deep and refuse to show ID, it would sure make for a bad day for the cops running the checkpoint and might be worth doing. Question is, how do you convince people to grow some balls to do something on a somewhat large scale like this? Safety in numbers should be enough to convince these types to do CD like this. If only they would think about it.