I believe it is only a matter of time before the cruelly confining seating on planes causes someone to throw an embolism.  Any medical person can tell you that it is inherently dangerous to the health of any adult to have your legs crushed into a small space for several hours.  A massive law suit will ensue and then we might get back to a rational seating space.  In the meantime my advice to grown ups is to stop behaving like brainless sheep just to save a few bucks and do as I do.  DON'T FLY on commercial airlines.