The website you linked does not address the situation described in the comment above - where family members disagree with an individual about the time of death, and pressure them in to making a different decision than they would otherwise. (If it does, I missed it. For this reason it's often helpful to reprint your quote in the comment that contains the link.)

Again, this can already be seen happening in life-support cases. I won't say "ask any doctor," because I haven't asked every doctor, but it's not too hard to find first-hand accounts.