Hi,
Sorry, I don't normally visit this forum, but I was just passing and noticed two threads. This one and the other relating to leg room due to seat pitching.
Now, I am 6'4 and naturally long legs. I cannot do anything about it. My height is purely as nature intended. However, due to the natural growth, I am penalised if I want extra room for my legs. I am either not safe in the aircraft (in the case of emergency) or I have to pay extra. Unfortunately, I have absolutely no choice as to my height. I cannot do anything to become smaller. (an unfortunate side effect as well is that I am fairly heavy (230 pounds) but I look slim and can most certainly fit a seat with no spillover).
As for overweight people, I am in agreement. Overweight is not natural (in most cases). If someone needs a wider seat, then they should pay for it, or else not allowed to board. Overweight people DO have a choice. Pay more or become healthier.
I think a spillover guage would be a good idea.