Well what is the worst case scenario here? A google-like site where you could type in any plate and see its entire history ( aggregated from all the licence plate scanner sources )?

There's no end to how bad this could be. Say with a free account you can see their history for the last 10 days but with a paid account you can have unlimited access!

Also with the paid account, you can geofence any license plate and get SMS notifications when they go outside ( or inside ) a boundary.

Where does it stop?