I recall research being done on this. Basically there were concerns about cell phones igniting fuel, and this was practically non-existant.
A spark to the filler on the vehicle is the main trigger to ignite the fuel and this was mainly generated by people entering and exiting while the vehicle was being fueled. They would build up a charge which would then be discharged as they went for the nozzle.
Women were the majority in this, only because they would get out, start the process and then go back to get a purse to pay for the fuel.
It's been ages since I've seen a pump that will allow you to latch it on to fill the vehicle, in a self serve station. Since you have to hold the pump on, here, I don't expect it's ever been an issue.
Can you still latch the pumps in other places? CopperKat, I'm under the impression that's still possible in your area...