i dont fly tons, but on the 6-10 flights that i have taken over the last few years (all of which between Philly and Orlando - only a 2-3 hour flight max) there is just a contstant stream of people going back and forth using the restrooms for that entire flight time. as soon as they give you the all clear to get out of your seat they just jump up and make a bee line for the restrooms at the front and back of the cabin. they are always making announcements to not wait in line for an open restroom, to wait in your seat for the door to open to take your turn. do i ever use it personally, heck no....i get skeeved by such places. but my daughter...different story. upset stomach (reguardless of if i restrict her food or fluid intake pre/during flight) lands her in there (with either DH or myself to assist...she is only 5) more than once during that short flight. all sorts of conditions would make "holding it until the flight lands" impossible for many. (another "for instance" my father has no large intestine because of cancer...only small intestine which means when he gets the urge to go...he has to answer now. can't put it off for 10 min much less an hour. or what about the person with an enlarged prostate that has bladder frequency issues?)
i don't really see this restriction sticking for too long. consumers want to be safe, but they don't want to crap/wet their pants in order to do so. for those of us that are healty adults we can't fathom why this would be an issue. however there are SO MANY out there that are not capable of that kind of restraint. it is not their RIGHT to fly and they may not be able to if this stays in place. however it will be one more way stuggling airlines have to ride the fine line between safety and excluding some of thier consumers.