Your hyperbole is inappropriate here. As an analogy, laws already make exceptions to discrimination if the nature of the job requires certain abilities. Go lo

Your hyperbole is inappropriate here. As an analogy, laws already make exceptions to discrimination if the nature of the job requires certain abilities. Go look for manual labor jobs and you will see statements like "applications must be able to lift X pounds to a height of Y feet". One might naively claim this was discrimination against some disabled people, but an exception is made if the job requires it. Likewise, if a person does not physically fit into an airline seat, it does not seem unreasonable to me that they would need to pay for a second seat (or a first-class seat, or an extra large seat, however the airline chose to handle the situation).