madman you are not wrong in your direction.
One of the problems that all aircraft manufacturers have to deal with now is the increased average weight (or should I say mass in this pc time...) of the occupants of an aircraft. Unfortunately few of them are addressing the problem.
The biggest problem is with the older aircraft, mainly US built light aircraft of the 1960's to 1980's. Recently I had an application to learn to fly from a gentleman who admitted to 130kg, but looked larger. This was for a light helicopter, where thankfully the manufacturer had put a maximum seat mass into the flight manual. So it was easy to decline.
But wait for the law suits. "Discrimination" they will cry, when all of us in the industry know that there is a psychological reason why obese people should not fly aeroplanes.
Aviation requires self discipline, which includes the discipline of health. People who chose to get obese are unlikely to have the strength of character to learn the subject and stick to it. If you cannot stick to a regular diet, it is unlikely that you can handle the regimentation of civil aviation.
[back in the foxhole awaiting incoming]