I would suspect that for most of these people who have done it, they are referring to the ones that go through the nose or throat to the stomach, not the ones that have been placed into the abdomen. I also suspect that these other people die from other things before the lack of food and water has kicked in. I also suspect that they offered their loved ones at least water by mouth through ice chips or sponges. If not, then they are feeling the guilt of killing their own loved ones.
I am so tired of their personal rhetoric. No one has acknowledged that Terri Schiavo was disabled and NOT on life support and NOT PVS! It's infuriating. A dog cannot express itself either but we assume that if it is afflicted it doesn't want to die by starvation!!