I've always wanted to earnestly ask if they have ever shunned someone close to them and how they feel about it.
I already asked that one. I know firsthand that his family has been torn apart by this cultish practice. The response I got was a complete suppression of human emotions. I also saw the typical place the blame on the person who is no longer part of the group. "They left Jehovah. They want to sin. They want to live without rules." I got the impression that showing too much real emotion about the situation might imply a lack of faith in "God's ways". I do plan on bringing up the shunning policy again, but I imagine that's not a subject they feel very comfortable discussing with a potential convert. It certainly doesn't give the best witness about the love they have amongst themselves.