Has U.S. Airways gone berserk in its dress code? Have men's knees and boxer shorts suddenly become obscene?

It's usually Southwest that gets all shetty about dress. They have kicked a few men and women off flights for dress related matters. I think it was even Southwest that made a gay couple sit in different sections when one held the others hand during some sketchy turbulence. It's BS but they are private companies so all we can really do is choose not to fly with them if it bothers us.