I've been demoing a new database the past month which contains something like 80 billion records from license plate readers around the country. I never knew how widespread they were. They're supposedly going on amazon, ups, and fedex trucks as an additional revenue stream. I put my own plate into it and it had pictures of me driving on the roads, my car in my driveway and at my office and stores It has the GPS co-ordinates of each photo, dates and times, etc. You can also geo-fence an area and see all the cars that were read within that selected area. You can set an alert where you get notified if a plate you set is read somewhere.
Some pretty intrusive stuff.