I'm very happy that you had a good experience in good facilities.
Speaking as a nurse with 20+ years of hospital experience...a DNR is an excellent way of insuring deficient and neglectful care.
Don't know what ghetto you have been watching that happening at, but I've never seen it and I've seen everything from the elderly with that to younger people in cancer wards.
If you die, they won't try extraordinary means to make you a brain dead member of the family on a machine breaking the family bank for no reason.