With technology, there is no reason we could not have this. Look at the back of your driver's license. Do you see the little magnetic strip that contains all your personal info? Now consider the picture on the front, and the possibility when you combine that electronic image with facial recognition technology. You cold in essence build vending machines that were able to verify both if you had a proper ID, and if you were the proper owner of that ID. Probably could do the job better then a twenty something year old kid behind a liquor store counter.