There are very good reasons for some businesses to use ALPR technology. EasyPass and other automatic toll-collection schemes use RFID tags on cars to uniquely identify them. There are parking-lot control systems that use RFID tags to allow access to paid parking lots. ICS, the largest vendor of car wash management systems, sells an RFID subscription package. One of their tags is on my car's windshield: http://www.icscarwashsystems.com/index.php?product=17

ALPR has some technical and business advantages over RFID. The RFID car-identification solution has been around over ten years; ALPR wasn't as effective then. If it has been, we'd probably have ALPR toll-collection systems instead of RFID.

I hope this pushback against ALPR won't extend to private uses of it for reasonable and limited purposes.