How many people can stand on airliner's wings? This photo of Allegiant Air flight 331 got me wondering: how much weight would a typical airliner's wings be able to hold?



Aside: Apparently these folks didn't realise that if they smell gas in the cabin, they probably shouldn't decide to go out of the emergency exits and stand ON TOP OF ITS TANKS! God forbid one of them gets nervous and lights a smoke!

My question is basically: how much weight are airliner wings required to hold $\div$ the average passenger weight? Theoretically how many people? :)
Disregarding the fact that the wing load vector on a passenger jet usually points up, not down, the wings will usually bear most of the load for the entire aircraft. The MTOW for an MD-80 is 63,500 kg. If an "average" passenger is 80 kg, then that is 800 passengers. Obviously that is going to be greater than the number of passengers on the flight, because those wings had already lifted those passengers (and the rest of the plane) into the air in the first place.