[crikli]

Interesting that they don't mention luggage, which if we're talking about weight is a significant factor.

For example, my wife weighs 105lbs but has been known to bring her weight in luggage (not kidding). I weigh 240lbs and usually bring a laptop and a couple changes of clothes in a small carry-on.

Only way to implement this (unimplementable in reality) idea would be to charge for the total weight being transported, passenger and luggage.

[rsynnott]

It's already quite common for airlines to charge based on weight of luggage (or at least set a limit beyond which you pay extra).