Sox, I understand what you are describing about the legality of a machine doing a police officer's job. It's an interesting spin on the subject and I'd be interested on how this plays out with the bloodsucking lawyers. Sorry, I don't know too many lawyers I liked or trusted.
However, I hate to go down this road an play the "devil's advocate" but if that was the case for everything, a machine doing the cop's job, then you could find fault in every criminal investigation that was aided by science or technology.
FOURTH AMENDMENT [U.S. Constitution] - 'The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.'
This is directly from the Constitution. Like I stated earlier, there is no expectation to privacy with a motor vehicle's registration plate and the plain view doctrine comes into play. To break it down, "
observing" seems to be the key word. Did the officer observe the vehicle? If so. How long does he have to observe it? If we get past that and lets say for argument sake, the officer did observe the vehicle, even if it was a fraction of a few seconds, then the machine ran the registration. Is that legal to have the assistance of a machine? All good questions in my opinion.
My argument(if I were a lawyer,which I'm not)would be no officer is observing the license plate,a machine is.Not only is it not an officer,the device checks all plates it can visually acquire.There is no randomness whatsoever.It's checking each and every vehicle.
If this is the case and there is no "randomness", then you cannot use the argument of profiling. Every vehicle is treated in the same manner and nobody is being targeted individually. Very similar to the sobriety checkpoints that are conducted in some states, but that subject is another nightmare in itself.