Once again the issue of oversized passengers on plans is back when a picture surfaced of a very large man sitting in a aisle seat and essentially blocking most of the aisle.
Airlines will say they often try to accomodate large passengers by offering two seats and sometimes charging them for two tickets.
Aviation experts will say if it is an issue of safety. FAA rules require an aircraft to be evacuated in an emergency in 90 seconds and they point out that oversized passengers can hinder the evacuation. Plu there is also the consideration of a passenger's sensibilities and their rights, not to mention the publicity that can sometimes arise when they force a large passenger off of a plane.