Please don't assume that everyone who pulls up to the RV lanes, or even the truck lanes, is a jerk, because there may be a reason you just aren't aware of! At the Flying J in my area, I've noticed the diesel pumps at the RV lane have one last final fuel filter installed in-line on the hose. I don't see a filter like this on the car-lane diesel pump. Until somebody pops the cover on the pump and shows me that it is there but just out of sight, I'll have to continue going to the RV pump that has this extra protection.
But, the rest of the story: There is rarely, if ever, a line. If someone pulls up before I finish, on those rare occassions when I haven't used "pay at the pump", I move my vehicle before I go in to pay. And if someone has pulled up while I was inside, I walk faster, make eye contact, and tell them I'll be moving right away.
I agree, there are a lot of true jerks out there, but if you jump to conclusions you may sometimes put some nice folks in the wrong group. Don't worry, the real jerks always show their cards soon enough!