[photonios]

I worked for a company that did exactly this. It provides security for the majority of the gas stations in the country. It scans every single license plate of cars entering the premise. It then queries a freely accessible, government provided database for the car's model and whether it was reported stolen. If it was reported stolen, the alarm goes off. Also, if the license plate is on the country-wide blacklist that the company maintains, weeeh, the alarm goes off and the pumps get blocked. They also attempt to match license plates to individuals so they can be recognised when they return. Of course, all of this is linked to transaction history etc.