This sort of thing always pits passenger against passenger, but the real villain has been the airlines all along. They "encourage" people to check their bags then charge you more to do so. They cram as many seats into the fucking plane as they can, amplifying every small problem into a big one.
What the airline company really care about is weight. To address that, they could charge you by the kilogram. If you’re heavy or bring lots of stuff with along, you would need to pay extra. This would encourage people to bring as little as possible or send their stuff to the destination through some shipping company.
Yeah, I guess that’s the only reason they haven’t done that already. Although, I’m pretty sure that eventually some ultra cheap airline company will optimize the hell out of everything like boarding efficiency, take-off weight and everything to make the tickets as cheap as possible.