it's not a question of a "world" where this happens, it's a question of a subset of the world where you're forced by circumstance to be very close to a person for very many hours. That's kind of like saying "I don't want to live in a world where you can't stretch your arms out without being considered rude." Yes that world would suck, but we're talking about a frigging airplane.
I get that, but my point stands that while you're forced to be very close to them, you're not forced to talk to them. You could even make up an excuse for not wanting to talk. For example, "Sorry, I don't want to chat right now, I'm going to try to take a nap" or "Sorry, I don't want to chat right now, I'm going to put my headphones on & listen to some music". This isn't Clockwork Orange where he's forcing your eyelids open.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.