I don't want to rain on anyone's parade but the whole idea of the checkpoints is the mere appearance of a "Random" search! Its extremely evident from this Topic that many do not know the "power's" that an AG inspector has, whether they have any or not. The 5 mile warning that a checkpoint is ahead is enough in many cases to cause uneasiness within a vehicle full of people. That's the whole idea...that's the reason, in many cases, the checkpoint is just a wave through or not manned at all.
While our friend from NY didn't wave his right's, another unsuspecting traveler may not be so savy and allow such a search and in doing so, will make onlookers think twice! We all realize its a deterrent rather than catch all inspection..IMHO!