One horrid outcome of shunning happened within family that I was close to. A sister suffered from a severe mental illness. She would hallucinate and do things in a fugue state that ended up getting her df'd. She had 5 grown brothers and sisters, as well as her parents that should have been looking after her, but because she was df'd, she had no one.
SShe had an episode and ended up jumping through a plate glass window and fell 3 stories. As a result she ended up paralyzed and on life support. Her family only came to the hospital when the medical staff called them when decisions needed to be made. They only spoke to her right before she died. The family never told any of the "friends" what was happening to her. I can't begin to imagine how alone and frightened this young girl must have been. Such a "loving provision".