so this actually hits home with me. I'm on a plane, well at least 4 planes each week... sometimes as many as 10 flights. Some of you know me, I'm not a little guy but damn it I fit my as$ in my seat, my seat belt fits... even on the tiny regional jets.
I have been the victim of sitting beside some huge fuggers, one dude was so big on a little jet that I stood more than I sat...and that was on us SCAirways home of the tightest seats in the air. The flight crew, also not skinny minis could care less.
I was on an American flight (my preferred carrier) to San Juan. The guy behind me couldnt fit his big anus in the seat... and this was on an airbus 300, not a tiny plane. Kept kicking my seat, hitting the headrest, etc because I wanted to put my seat back and sleep on the freakin 5hr flight. Fortunately status matters, the flight crew moved his big ole as$ back to the "open seat" which was actually smaller (back of the plane vs front of coach) and right beside the shidder.
Now, I think if your anus dont fit, you buy your butt more space. Paying to increase to to bus. or first class makes sense sometimes, however you are only really talking about an extra 3" of width to the seat in most planes. The biggest difference is space between seat backs when you move to the front of the bus.
The real problem is people dont take responsibility for their actions. If you are a big anus person, its not a secret to you, plan ahead. Its not like some size 6 lady or a guy with a 36" waist cant fit in the seats... these are size 20+ and dudes with 44" waists that cant fit.... You aint shopping off the rack when your as$ is that big