Originally Posted by
akl_traveller
I don't get why basic queue etiquette breaks down so much at airports!
In the U.S., it's two things.
(1) Every airline has a different system. There is no single universal etiquette.
(2) Most gates at most airports have no such queues. It's not four to six well-marked, roped off GXXXXXE queues. It's Gblob. Even within the AA system, it varies widely by airport.
Southwest is really the only one that tries for form queues everywhere using a system that is consistent throughout their network.