It's not that they'd be printing and pasting. It's that they would be printing it out on quality paper with a high end inkjet or color laser and getting it laminated. So a college student in New York could print out a drivers license from Montana and go to the local corner store for some beer. Most likely the clerk behind the counter at two in the morning has no idea what a Montana license is supposed to look like and whether or not Montana licenses are laminated. Sure there are books out that show what every license is supposed to look like, for bartenders and convenience stores, but how many of those books are out of date and how many are actually used?