I don't think this forum is limited to those who are having serious difficulties. If things are going well with his family and he wants information that he thinks can help him keep it that way, I don't see the problem.
I have a relative on my wife's side of the family who was baptized, pioneering, etc, then decided he didn't want to be a JW anymore, and moved away and moved in with a wordly girlfriend. The parents went out of their way to not tell the elders about his situation and where he was currently living, phone number, and so on because they didn't want him DF'd. After the smoke cleared in a few years they started associating with him again. He has never been Df'd and has been openly doing lots of things you could be DF'd for and it has been 20+ years. He has attended JW weddings and is basically treated like an unbelieving family member, so it does happen.