In just two years, 9000 of these cameras were installed to spy on your car

Now, a new generation of tech firms has made it possible for private citizens to use the devices, known as automatic license plate readers, or ALPRs—without the strict oversight that governs this type of data collection by law enforcement. Putting ALPR into civilian hands allows for a broad range of new applications, including customer service and school security. But it also raises untold numbers of new legal and ethical issues, few of which have yet been tested in the courts, experts warn…