I do this - especially if it is cold or rainy.
Just put hose in place quickly, latch, get back in the car and lower your head below window level and wait.
Then I would get out of car stooping to keep the car between me and the view of a sniper and remove the hose, forget about a receipt and get in and drive off. Can be done and I would sure not want to stand their with a gas hose by a gas tank with a shooter watching.
Another thing - if you have the option for a "Speed Pass" where you just run the key over the image on the pump - use that.
What happens if he just puts a bullet through the gas pump?
WHOEVER THIS IS, it's about time SOMEONE caught them. How can this bad guy(s) go completely undetected for so long? He isn't psychotic either. If he was, he would have realized at some point, all he had done and offed himself.
This person(s) is PURE EVIL and will not stop unless he is stopped.