I grew up watching Diff'rent Strokes. Everyday. After school. I wasn't such a hardcore fan that I maintained vigil after Gary Coleman died, but when things that you closely associate your childhood with die, it's just another nail on the coffin of your childhood and innocence.
If the story has merit, and he truly did have an advanced directive that said "do everything", then that means his DPOA...his ex-wife who has the intellect of a dog turd, went against his wishes. While his prognosis was bleak, and chances of recovery were slim, and I personally feel that death was a better alternative than spending the rest of your days in a persistent vegetative state, it apparently was his wishes to do so. No matter what reasons she may have had to pull the plug, his ex-wife should have honored those wishes.