With people becoming increasingly larger, perhaps it's time for the airlines to pursue a different philosophy selling their seats. Perhaps 10 percent of the seats on any given flight could be small, providing plenty of room for children and smaller adults, 70 percent of the seats medium or average size, and the remaining 20 percent large seats to accomodate larger passengers. It would then be the option of the passenger to purchase size appropriate seats at the time they buy their tickets. The smallest seats could sell for a little less than the average seats and of course the larger seats would cost a little more but not as much as buying two seats. The airlines would not lose any seats as the little extra room needed for the large seats would be offset by the space gained by downsizing the smaller seats. This concept should fly legally using the rationale that it costs more to transport a large person than it does a smaller one. After all, shipping companies charge more for hauling 100 pounds across the country than they do 85 pounds. I think heavier people wouldn't mind buying a larger seat as they would be more comfortable and they could avoid any embarassing scenes at the airport. Current airline seats are just too small for anybody larger than 5"10" and 180 pounds, which includes many of us. This problem will not go away for the airlines because Americans continue to expand their weight and girth.