I have to agree that this is a business. If you require "more room than one seat can give you" you should pay more. There are weight restrictions on flights (including people and luggage), if they go over then the plane can crash. I know this is an extreme example. In addition to this, the person next to the obese person has paid for a comfortable seat and is instead VERY uncomfortable.
I agree too however, that a screaming child should pay more! Flying should be a serene experience not one that requires ear plugs!! Anyone requiring extra support or services should have to pay for it.
JMHO (you can bitch at me now!)
