So, I'm not sure of the validity around here but I can bet that it has happened and may happen again here.  According to a recent investigation from the Department of Agriculture, 3 out of 4 gas pumps are rigged to make you pay for the gas you're putting in your car without you knowing.  Basically, it's overcharging you by claiming you're putting more gallons of gasoline into your vehicle.  Take a read.  Have you been cheated at the pump from something like this?  Do you think it has been happening around here??