If you were to request the forum administrators to make the distinction between the open and Christian only sections more prominent, and direct those seeking Christian advice to the specific Christian sections in a much clearer way, I would support such a move. In the open sections members will post in line with their personal beliefs, religions, orientations and experiences. For those in crisis some of these posts could be challenging. It is a challenge I hope they could rise to, but they should have the choice of avoiding the challenge in the first place. That choice currently exists, but - as I suggest here - it could be more clearly flagged.
As an aside you do not tell me how to be an atheist, but several of your co-religionists have told me (incorrectly) what I believe, what my morals are, etc.