Do you turn off your engine at the gas station?

Even tho the engines put out less vapors in normal operation, a fuel spill still does create vapors once it is on the ground.
A running engine produces some sparks and static electricity that could ignite the fumes from a nearby spill.
I find that it is not too difficult to turn my ignition key off, and then on again. The DW also always gets out of the vehicle during refueling, just in case. It is a good time to take the big dog for a walk.