With a digital license plate it should be possible to display a random number or no number while in those locations(work or mall parking lots, your driveway, etc.,) where there is no legal requirement to show the plate number. Alternatively the digital plate could be configured to flash the plate number at an interval longer than the typical plate reader vehicle takes to pass your parked vehicle. That would at least cut down on the capture rate of government and auto loan companies that cruise parking lots which is a good portion of all scanning activity. Unless the digital plate is reporting it's location via cell network.