May I recommend the example of Michael Schiavo? First, obtain a jury award of 1.4 million dollars. Then pull the plug.
I have it clearly in a living will and have made it clear to more than a few that I don't want family members sitting around a body that will never recover. No, my requests are to just cut off or unhook anything that may be keeping me there, shut off the light, get out the door, and head on with their lives.