From The time has come to let Terri Schiavo die at MSNBC.com:
We have had a consensus in this country that you have a right to refuse any and all medical care that you might not want. Christian Scientists do not have to accept medical care nor do Jehovah’s Witnesses need to accept blood transfusions or fundamentalist Protestants who would rather pray than get chemotherapy. Those who are disabled and cannot communicate have the exact same rights. Their closest family members have the power to speak for them.