I pay at the pump. In fact, if a place does not have the equipment for pay at the pump, I will not use their services.
For those who do not believe in credit or debit cards... First. Change your attitude. Then, pay at the pump.
For those who think gasoline is free. The automakers could develop an electric eye that shuts down the electrical system until the gasoline is paid and the driver keys a code into a keypad on the dash. If they do not pay, they do not get the code. If they do not want a recipt, they would be required to go inside or the pay window to get the code. Cameras could photograph the vehicles license number for refrence. To access the pump, the driver would be required to enter his or her drivers license number unless they use a credit or debit card. The information would automatically be sent to the police dispatch via the stations alarm company. The police could have the vehicle detained before an officer arrives at the scene of the crime... Yes. Crime. With pictures of the car, license, driver, and data from the pump, the drive off offender would not stand a chance. Plus the electric eye would ensure the vehicle stayed put until payment was made.
THAT would solve the problem.