I believe I was just witness to the same kind of behavior in a casino.
Two old ladies are slowly walking toward a ticket redemption machine. I'm headed the same way, directly behind them, with a redeemable ticket. Lady#1 pulls out a ticket and feeds it in.. all the while the both of them are talking to each other. The total amount of the ticket is $32, which Lady1 counts carefully while lady#2 fumbles in her purse for her ticket, both still talking to each other. As Lady#2 cashes out, I'm now looking forward to them both leaving the machine to me, and the guy behind me.
No, they both continue to stand right in front of the machine, talking more, very slowly edging away from the machine. Neither one even bothered to look behind her to see that there were other people who wanted to use the machine. No, they just ambled very slowly away, all the while talking and trying to stuff bills into their wallets. Totally oblivious to anyone around them.
If I can draw a parallel of this behavior to how people act at gas stations, I can only conclude that, just like these 2 old gals, the fact that other people need to use the device is not even a part of their consciousness. I know how hard it is to do just about anything when carrying on a conversation, and, their comfort and their conversation are the only thing in the world right at this moment. Nobody else is really there.