My guy, the line is a status symbol one earn by paying bonuses up front or letting their company pay.
There is no greater good here. Line cutters aren't somehow immoral.
If everyone boarded in logical patterns of staggered odd window even window odd middle even middle odd aisle even aisle boarding, with no pairs or groups allowed, you'd be on to something.
But it falls apart the moment you look at how it's actually done. Status and rewards, and seat class, then whatever is left. Cutting in line because you didn't spring for an $80 seat upgrade that amounts to "better" padding in the headrest and 1 extra inch in your legroom is insane.
I would love to.
Please build trains or stop blaming me.