Flying While Fat

A Canadian court ruled last week that obese people have the right to two seats for the price of one. Althouse asks:

If you get a free extra seat now, won't people be clamoring to be considered one of the truly obese? Does some government agency certify that you are fat to the point of disability and thus entitled to accommodation? Or is this just a matter of airlines telling some people they'll have to pay for a second seat -- and now, they're being told they will need to give that seat for free? If the latter, some of the chubbier passengers may decide to sprawl strategically to extort extra space from the airline. If the plane is full, who gets bumped?