Not 100% library related, but, The NYTimes has a Scary Story on the information people can get off of your drivers license. A bar owner found that he could build a database of personal information, providing an intimate perspective on his clientele that can be useful in marketing.
A good story for to answer the ol\' question \"Why do we worry about patron privacy?\"
\"You swipe the license, and all of a sudden someone\'s whole life as we know it pops up in front of you,\" said Paul Barclay, the bar\'s owner. \"It\'s almost voyeuristic.\"