I was next to some guy about that size (needed a seat belt extender), and he asked if he could put up the arm rest. I told him no that was the only thing keeping him from spilling into my seat. He really was PO’d at me, but the armrest stayed down.
She spilled over and under the arm into my seat anyway. Miserable flight.
I feel bad for the oversized passengers, I could stand to lose a couple of pounds myself but I still fit into the seat and no one would be uncomfortable sitting next to me.
The airlines have really made cramped quarters for us but it is what it is, and if a big person has to buy 2 seats they just have to do it. It is not right for them to make others miserable because they don't fit in the space they have purchased.