Most of those folks, I believe, meet the criteria for brain death and/or or are being ventilated. If I remember correctly. Please correct me if I'm wrong. We've had an experience like that. Neither of those things applies in this case. For folks who don't have a living will, all I can say if they'd better get one or pray they've got family members more loving than Michael Schiavo.
If any good is to come of this case, you're right...people will get Living Wills.
Our family did the same thing with a stomach tube for an aunt, based on her ORAL orders only when she still had the capability to think and make decision, when we all knew there was no hope.
I'm not advocating it as a humane thing. I think this country needs to determine these things...how to proceed in the future. And if we're going to litigate these matters when family members disagree, we're going to need a LOT more judges.