Godalmighty, happened to me from JFK to DFW...
I was one of the last to board. Seat number..OK. Finding myself next to a 'tub of lard' I called the flight attendant over. She was (AA, natch) angry at being bothered by one of those strange things that pay the wages..Oh, 'Customers'.
"Just (the 'fuc*king was implied) sit the (implied again) down".
Finally I showed her the problem. Not only was the lard-tub - window seat - occupying both her and my seat, making it impossible to fasten my belt, let alone sit in my seat, she was enchroaching the fuck*ing aisle with some pink treetrunks someone might have mistaken for legs! She could have prevented the drinks trolley proceeding down the aisle. Far more worrying, natch.
Flight attendant relented, when I suggested she (F/A) swap places - me in her 'jump-seat' , her in mine...(She could've sat on my lap, but I wasn't in the mood), I got a new seat. At the back, where the drinks trolley starts from. Then reversed when stopped by the treetrunks. There are small mercies...YESSSS!
God-all-fuc*king-mighty, I've _never_ seen a fatter person. By her (rather pretty) face, I'd have guessed the lass at about 35-40. I'd have pity, but (AA gives out 'grab-bags' for lunch as you board on internal flights) I noticed she had grabbed three. Genetic? Pull the other one.
One other thing - she would NOT have got out of the over-wing emergency exit in an emergency. Now, ain't that a better reason to restrict fatties? "Place your carry-on in here, so we can make sure it's regulation. Now please pass through this pervy all-body scanner. Ta muchly, now be so kind as to pop into the departure lounge through this emergency-exit-sized window. Thank you so much".