Here is something else I was thinking about these stories. Maybe the reason so very few of these stories have benevolent spirit encounters is that the people who have these types of encounters rarely submit them to the show or the show rejects them in favor of the scary stories. It may also be that spirits with good intentions won't intentionally reveal their presence while they try to protect the living from the other evil spirits.
A trail goes two ways and looks different in each direction - There is no such thing as a timid woodland creature - Whatever does not kill you leaves you a survivor - Jesus is NOT a bad word - MSB