coastal984 writes with news that the American Civil Liberties Union is launching a nation-wide effort to find out how police departments are using and retaining information gathered from license plate scanners. They've sent FOIA requests to departments in 38 states, as well as the Departments of Justice, Homeland Security, and Transportation. "It’s not an exaggeration to say that in ten years there will be [automatic license plate readers] just about everywhere, making detailed records of every driver’s every movement, and storing it for who knows how long. In some cases, we know that the worst-case scenario—vast databases with records of movements of massive numbers of people—is already happening. To avoid this fate we need to convince the nation and our lawmakers to take action on this serious threat to our liberty. And to make a convincing case, we need to know a lot more about the problem as it stands. Last year, most people didn’t know why we should call our mobiles 'trackers' instead of phones; there was very little public information on how police departments were using our phones to track our location. The ACLU stepped in and spearheaded a massive public records project, bringing together affiliates from every part of the country, obtaining documents that showed how police nationwide were getting access to our intimate information without judicial oversight."