This is bullshit. Yes, obese people usually have a genetic predisposition to being overweight, but mainly it is due to lifestyle choices, diet, etc. Manute Bol was freakishly tall, something he could not do anything about. If obese people eat healthy and exercise they would not be obese, period. Also, each flight costs a ton of money, wastes a lot of energy, and pollutes so giving away seats to fat people is not exactly energy efficient.