"Maybe extremely heavy people who are literally spilling over into the seat next to them should be forced to purchase two seats or upgrade to a roomier first cl

"Maybe extremely heavy people who are literally spilling over into the seat next to them should be forced to purchase two seats or upgrade to a roomier first class seat, because it's not fair for the poor guy sitting next to him." This! Every time I fly I'm nervous to see who I'll be sitting next to. I'm already cramped in my seat and I really don't need somebody else's fat (I don't mean to be rude here) taking my space. Not to mention invading my personal space. And then there's the matter of hygiene or lack there of. Airlines should really be doing what you are suggesting here.