Which is why I make sure I ground myself before I touch anything related to the gas area of the car. This is espically crutial during the winter when static electricity is naturally higher due to the reduced humidity in the air. It has nothing to do with the fact that your car is running, but rather with how your ass slides against the fabric on your seat to cause static electricity. Studies have shown that it is the vapor coming from the physical pump nozzle itself that causes the fires, not wether or not the car is running. It mostly happens to women due to the different fabrics that they wear and their perpensity to conduct static electricity when they enter/exit the vehicle. Regardless, I always touch the side of the car after I get out and also do so before I touch the gas pump to refuel. It is just common sense and I do so regardless of the season. I figure that diesel trucks rarely cut their engines during refueling (even though diesel fuel is less volitile) and it does not hurt them, so I am pretty safe as long as I am careful about it. It's not like I am burning a tiki torch 2" away from the nozzle.

Cliffs notes: don't be stupid while refueling.