QUOTE(Alex+R @ Jun 29 2007, 01:34 PM)

Because despite the cutbacks in airline services, the size of your seat is not the only cost involved in flying, and of course, we can't assume a proportionate extra amount of weight for fuel or anything.
I think making a row of seats that are not nominally for large people, just for comfort, and then occasionally giving large people a lower rate on them, is fair. It would keep large people from sitting in normal coach rows and inconveniencing people and wouldn't make flying cost-prohibitive for them.
It may not be the only cost, but it's a big factor. There are weight restrictions on luggage for a reason. Piggybacking off the 'can't assume proportionate extra weight for fuel' is a non-issue...try bringing some oversized and overweight luggage...or even an extra piece of luggage...and see what happens. I can't say to the ticket counter...oh but it's a necessity for me...they'll say 'ok, no one's sayin you can't bring it, but you gotta pay for it'
The bit about the bigger seats not nominally for large people? That's called business class or first class. Giving larger people a break on them is not fair at all imo...Why should larger people have roomier seats at essentially the same price? It wouldn't inconvenience me physically, but financially it would become a burden on every other passenger flying coach.
Think about it...a row of these seats...let's say it eliminates 3 'normal sized' seats. That's 3 seats of revenue lost each and every time that plane flies. Sure, the law of avgs is that most planes won't be fully booked, but over time the smallest differential in cost for any business CAN add up to an exhorbitant figure. The airline will not take the hit...it will be passed on to everyone else.
Now as I said before, if the cost increased is reflected in the price adjustment, I wouldn't have a problem with that at all.