My thoughts are with you having for to deal with all that. We had a DNR for my father-in-law who was dying of colon cancer. He'd already had a colonostomy, bag and all, and didn't want to do through anything else. My mother-in-law and sister-in-law took turns keeping him comfortable, supported and happy until the end, with the help of some TERRIFIC hospice workers (srsly, those ladies practically became part of our family!). He died peacefully at home, proclaiming to all that he was having the best death a person could possibly have.
Thank you for bringing the issue of DNRs and living wills to the fore. It is NECESSARY that you put these things in place BEFORE you become incapacitated!!! DO NOT assume that your family will accede to your wishes, or even be ABLE to do so. DO NOT make ANY assumptions about your care if you should be faced with a terminal illness.
My husband and I both have living wills and DNRs. My mother has one as well, as does my mother-in-law. It only makes sense to do this so that your family isn't burdened at a time like that with guessing what you might or might not want done.
Above all, it makes life SO MUCH easier on the medical personnel tasked with caring for you at the end. I shudder when I hear stories like this and, again, my heart goes out to you, Trouble_In_Shangri_la, for having to deal with such a horrible situation!!
~~Wiccan~~