I once took an overnight flight from the west coast to the east coast. The flight wasn't very crowded and I intentionally picked a seat away from other ocupied seats.

I get on the plane, as I'm warking back to my seat I notice there's entire rows that are empty. So instead of picking a seat in an open row, and this. fucking. guy. picked the window seat closest to my aisle seat, and he talked for most of the flight. In hindsight I should have just sat somewhere else when I first noticed him.

On a plane? That's much worse, you can't just change seats or get out if you want to avoid the person. Oh god

It's not that the trains are so full of drunk homeless people, but that trains are affordable and also conductors aren't going to physically throw out a person that could get violent. Planes you don't really get on without a ticket. An entire class of people are filtered off the plane because of that.

And anyway, said group are a minority, but they're the only ones who randomly talk to strangers most of the time. Everyone else minds their own business in my experience.

Leave me alone.