1) On the side of the overweight passenger

It does suck to have to pay 2 tickets
and i know it's embarrassing

2) on the side of the airline and other passengers
They've had enough complaints and lawsuits over this.

There's been stuff on TV done too... about a passenger paying for a ticket, only to find himself scrunched up in the corner because the person next to him took up more than 1 seat of space.

no fun being pushed into the side.


Unfortunately airlines have limited space.

Yes you can demand they build bigger airplanes and put more space between the seats.

they might listen.
however they'll ahve to charge more for the tickets since they won't be able to put as many people into them.