As gas prices continue to rise, one thing gas stations may have to deal with more and more are drive-offs, folks filling up and driving away, not paying for gas. Some filling stations are going to a 24 hour, "Pay Before You Pump" policy. Others have that requirement only at night. Some stations are just keeping a closer eye, even requiring cashiers to make up the difference at the end of their shift if they lose money. But authorities say it will cost violators more then just a tank of gas, if they are caught not paying. It could cost them their license. Authorities do expect an increase in drive-offs as the price of gas continues to rise.