What is wrong with this picture? I don't know the aircraft layout, but with a seat F, it is likely 3 and 3. Are we supposed to believe the poor passenger in the middle seat next to the large peson would refuse to switch to the open seat to accomodate? Siting next to a large passenger has to be less than comfortable for both parties involved. I would be surprised at anyone who insisted on occupying the seat with the large man spilling over in to it when a more comfortable alternative exists. I know I would be relieved to have the option of moving.