Personally, i think that it should be decided case by case, and if there's absolutely no hope of recovery, and if the person in question or his family agrees, it can be done.
------------------
"It's an elevation thing." - Adam (when asked about the airplanes in the videos, and the airport pics on ATYCLB)
"Not just any band...the best band on the planet." - Bono
"It's about finding your way into the music." - Edge about playing live
"There's still stuff left for us to do, and that's why we still do it." - Larry, 1998
------------------
"It's an elevation thing." - Adam (when asked about the airplanes in the videos, and the airport pics on ATYCLB)
"Not just any band...the best band on the planet." - Bono
"It's about finding your way into the music." - Edge about playing live
"There's still stuff left for us to do, and that's why we still do it." - Larry, 1998