I am a plus sized person. I was denied carry on luggage (different airline) and pulled out of the boarding line because I vocalized the fact that others - men with brief cases and laptops AND duffle bags; women with babies with diaper bags, handbags and over night bags - were allowed on the plane. I did get to board the plane minus my carry on luggage but then the same stewardess and manager were indignant that I would not trade my window seat with a person who wanted to sit closer to some acquaintance. I KNOW that I was discriminated against because of my size because the manager told me that the plane was already overweight.
I am not gargantuan. I do fit between the arm rests. I do not overlap into the next seat. I will refuse to fly if "overweight" people have to buy two seats. I will refuse to fly if the price of my seat becomes more due to my size. Airlines should enlarge ALL seats and increase the prices of all tickets. Comfort AND safety would be justification for an increase in costs. First class seats cost more anyway. Should people who have medical issues be penalized? Perhaps I do not want to sit next to a cachetic person with gastroentestinal problems...or an odiferous smoker. Period.