At Thromby Air our patented Fully Automated Tariff Adjustment Sizing System (FATASS) will ensure that generously sized passengers are well serviced. https://www.thrombyair.com/2010/09/departure-slots/

There are other ways to get extra legroom on flights... https://www.thrombyair.com/2011/10/leg-room-wishful-thinking/

There are other ways. For example, check out the new "Weekend At Bernie's" range of travel luggage at Thromby Air... ideal for minimum cost travel on low cost airlines: https://www.thrombyair.com/2011/06/avoiding-baggage-fees/

It all comes down to aerodynamics... https://www.thrombyair.com/2011/01/thromby-aerodynamics/

Any airline doing this kind of thing should have their head read.  The loyalty born of helping out those in need lasts a lifetime.  Consider that thought, versus forcing a family of four to stay in a potential radiation zone while you fly out with empty seats, because they cannot afford...