In those cases where someone hasn't signed away their right to life, do the same thing we used to do before written directives. Do the same thing we used to do when written directives were recognized as an individual's request that their care be handled differently than the standard care expected by a civilized society. Just because the right-to-die advocates haven't managed to con enough people into signing away their rights doesn't mean we should take those rights away from people who want them.
I agree. The family gathers together, consults with a priest, goes over the medical condition with the doctor, and collectively makes the best decision for the loved one.
That's the way it used to be done until the lawyers got involved.