Angelina If you are looking for practical propositions, I am not sure how much is gained by having them talk to each other and each other alone. Most people who stay here and have practical wearing experience are going to be somewhat older.
Still, if it is technically possible, then tagging them so their posts are only visible to registered members may be a step in the right direction - the content would no longer be visible to search engine crawlers, casual visitors and the likes, avoiding the issue of giving an audience to CSA fantasies, and if it is an opt-in role that allows seeing those posts, people who are regularly found to bring sexual themes into those topics can be removed from those discussions without being removed from the forum.
