You are absolutely correct. There is no official Mormon policy of shunning. The teachings from the leaders of the church on this matter are very generous and admirable and tend to be along the lines of something like, "reach out in love."

I guess what I was referring to is a kind of informal shunning where close friends or family suddenly cut off contact with you when they learn you have left the church. It would be nice if more people followed the loving teachings from leaders. Many continue to maintain loving relationships, but others want nothing more to do with you, even after years of friendship.

I take responsibility for this relationship shifting to some degree. Sometimes I wish I had never told anyone I had left the church so my friends and family would assume I was still part of the tribe. It's not easy to hide it though since various small hints can give it away, like being seen with a coffee or without your temple garment undershirt. It's difficult.