It's funny. I'm tall and fat, and I always buy two seats flying economy (and I'm completely fine with that). I weight more than 2 average passengers. Still, I b

It's funny. I'm tall and fat, and I always buy two seats flying economy (and I'm completely fine with that). I weight more than 2 average passengers. Still, I believe when boarding they note down that one of my seats is "extra" and I believe this is for weight and balance reasons, i.e. they only count less than half of my weight (european low-end carrier).