And the weight discriminations on flight attendants has been illegal since the 1980's.
http://en.wikipedia.org/wiki/Flight_attendant#Discrimination
Don't be silly, when is the last time you seen a 350 pound flight attendant? That job requires the person to be in certain physical condition and size, you can't be helping people getting out of the plane if two of you can't stand in the isle ways together. Same for age, I have seen many "older" flight attendants getting the pink slip because they can't push 80 pounds for 20ft as many airline requires for part of the physical condition test.
So you think the airline is discriminating if a 300 pound person that can't walk down a 15" wide isleway wants a job as a flight attendant?