Unless you fly first class -- airline travel is uncomfortable no matte how you look at it. being tall and slim leaves you with little leg room. the seats are crowded together. if the person next to you has been drinking -- you can smell their breath. if they forgot to shower -- you will know.
if they are loud - you will be annoyed.
if it really is a safety issue AND NOT COMFORT why don't you weigh the passengers? it's not just southwest. coach air travel is an inconvenience we all live with.
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