I guess I don't understand how running a vehicle history report by a license plate would be beneficial considering it's not uncommon for vehicles to change owners 5 or 6 times during their lifespan, often being registered in multiple states. Then we have the issue of people transferring plates (legally) from one vehicle to another and also the BMV recycling old license plate numbers.
Say for instance, I wanted to get a personalized plate for my red cobra, but before I do that, I decide that I want to register my white cobra and transfer the current plate for the red car to the white car, which is also a 99. Couldn't this pose a problem? Or create confusion? Also, what would happen if some idiot had your vehicle before you and had an accident while it was unregistered? Maybe I'm missing something, but I would think the only way to accurately track a vehicle's history would be by the VIN since it never changes and stays with the vehicle for it's entire existence.