As all the people saying they stand up to stretch their legs imply- we shouldn't be mad at the jerks who get up to get off the plane first, we should be mad at the airlines for packing planes so full that there's not a reasonable amount of leg room unless you pay a premium for it.

I have noticed that people in first class are often still sitting there when I leave in coach. And I don't jump up to be the first off the plane.