This would be called covering all your bases. If someone leaves the cult and is unhappy, on drugs, promiscuous, etc. it's proof that the world is a evil place. It's proof of what happens when you leave the protection of God's organization.
If someone leaves the cult and is happy and succesful, well it's because of the trickery of Satan.
I always let JW's know I'm doing great, never been better. Don't play their shame game. Hold your head up high and refuse to allow them to look down on someone who is no longer in the "Truth". There is no way I will let a brainwashed moron think they're better than me.