According to USA Today, United Airlines is redesigning its economy coach areas on their 777 aircraft for ten-across seating. Can you imagine being squished for hours in the middle of a crowded row of 300 lb. NFL defensive linesmen? Or well-padded  opera sopranos and bassos?

Of course, to accomplish it in an already tight aircraft interior, the already-small seat sizes will need to be narrowed. Not only will your flight be extremely uncomfortable, but imagine what happens when those big guys/gals and you need to get up to go to the bathroom.