Just block the credit card Satellite Signal being sent out by the gas station!!
Over 3000 gallons of gas were stolen from a BP gas station, by thieves that blocked the satellite signal that sends out the credit card information. So people would swipe there card and the gas would be pumped but the money would never be charged to the CC! People are definitely getting high-tech when it comes to stealing at the pumps lol
Heres the full story if you wanna read about it:
Full Story