One reason why dead head legs are sooooo despised. Nothing like boarding a 99% full flight with a rollaboard and 40 lb kit bag, in a wool uniform in the summer, to find the overheads 110% full, and the empty center seat surrounded by fatties or weirdos, who roll their eyes because they have to share.

15 years ago, there seemed to be always some first class seats available. Now, there's an upgrade waiting list a dozen names long for first.