Yes, unfortunately. My husband had one. When he went to the ER last year they DID NOT honor his DNR. I was not with him at this visit. He signed another one while he was recovering in ICU.
Last Monday he fell ill and went back to the ER. I was with him this time. He flat-lined and they immediately started resuscitation efforts. I told them he had a DNR and would they please stop. The nurse continued CPR (but they did not shock him) until the doctor came in, spoke to me for a second, and then told the nurse to stop.
I don't understand how they can lie to your face like that. He signed MULTIPLE DNRs. He was not kidding. He was in pain and ready to go. I do not understand why people who know nothing about you, your take on this life, and what you have been going thru think they can just ignore your wishes when you've done EVERYTHING you've been told is necessary to have your wishes and beliefs honored. It a disgusting system we have here in the US.