Yep, I decided when my dad died of a brain tumor that I would not go to my grave like that. He was the smartest man I knew; valedictorian of his high school, an electrical engineer, and an avid do-it-yourselfer. When he had surgery for his brain tumor, they removed the left front quarter of his brain. He went from doing the jumble and crossword every day to drooling in his oatmeal. That is NOT what I would want for him, or me.
If I come down with a life threatening illness, and the choice is be alive, but unable to function, I would choose the quick death.
I agree with the anecdote in the original story, tattoo DNR in large letters across my chest and call it good.
dsoz