I am not taking side. but isn't my state issued driver license just another form of national ID. it is recognized nationally. I don't think it would make any difference if the ID is issued by State or Federal. I am also required to show ID when asked by authorities. Police also can search your car any time he feels like (in a recent supreme court ruling, a policeman only has to prove reasonable suspision. he only has to say he smells marijuana). Trust me, when a cop ask your permission to search your car, you can not refuse. If you do, that is reasonable suspision to search your car.

My point is, there is no point arguing on a national ID system, we already have it. The sad thing is many don't realize we have already lost much of personal freedom.