I believe the most effective cure is exposing yourself to the struggles, and vr simulations have potential. There is even a social game where you can chat with others in a vr environment (avatars). As the technology gets more advanced, more real graphics simulations should be possible. But remember that even if you overcome your stutter fears and become more social, you are still going to met bad people that are plain rude and mean. I believe is all about the environments because in the bible when moses was called by God, he first denied the call because he was a stutterer. He really wanted to do it but didnt feel confident obviously. God then tells moses brother to speak for him, and later on moses becomes more fearless and well what moses did is well known. Cant think of a better inspiration for us than the example of moses jaja