And I've also heard stories of people of people who said (before they were incapacitated) that they would NEVER accept medical treatment that would keep them living, but incapacitated - well anyway, they end up changing their mind, and decide to go for whatever medical treatment is recommended by the docs making big bucks off that treatment.

It's interesting to note that most medical doctors accept far less end of life treatments, compared to the average population. Because they realize that living just a few days or weeks longer isn't worth it.