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http://www.timesonline.co.uk/tol/travel/news/article6099352.ece
http://www.businessweek.com/bwdaily/dnflash/content/apr2009/db20090420_108489.htm?link_position=link12
If you got time, take a look of these two articles.
Airliners are going to charge plus-size passengers if they can't fit in a seat comfortably. United airlines request overwight people to purchase two tickets or upgrade to a business class seat. It is reasonable.
Have you happend to sit next to a fleshy person on an airplane? He fills all space in his seat with his flesh. Guess how much time he needs to collect his flesh befre he can stand up and give you a way to the toilet. The flesh might spill to your seat too. The controllers of the radio or TV channels are installed in the armrests. You can barely change or you have to frequently ask them to collect their flesh before you can change channels.
Being fat might really cost you an arm and a leg!!