Yep. All sorts of reasons to keep the truck running. Personally, it's not about the risk to everyone else. It's about the risk to my truck. Having personally seen gas vapor go up with a running vehicle and burn the guy at the pump, the vehicle, the pump itself, and the awning overhead, I have no problem shutting it off. Used to be the only thing you needed to worry about besides static electricity and cigarettes was fumes reaching the engine compartment and possible sparks in there, especially with eroded plug wires. Yes, there are well-documented cases of all of these causing such explosions and fires. Then along came the electronics. Cell phones have ignited gas fumes at pumps. And so have other electronic devices: CBs, stereos, etc. And they keep jamming more electronics into these things nowadays. I shut mine down because it's my truck. Want to keep it that way. (gas - Hemi)
The numbers of actual events are small. It's unusual to even be an observer. It's kind of like the dog that steps on the gun and kills its master - pretty rare. I still keep my gun safety on until I want to fire.