Any airline would charge double

If a person will occupy two standard airline seats, the airline would charge for that.. only fair. I'm pretty sure only a very small proportion of people actually have a medical problem making them that large through no fault of their own.. mostly it is behavioural/cultural and they could be thinner if they had the right attitude. But obesity like what you just linked is merely one singular example among many that demonstrates major cultural problems emanating from the USA.. bad attitudes rather than anything innate.