Has anyone done this? The downside to the "Private Forum" option is that it won't grant users the option of knowing that a node exists, but that they don't have permission to view inside it. Also, if you grant "View Node" permissions to the registered user group, but *revoke* all other permissions, users can still see their own content. So if they previously had access to a node and have since lost it, they don't understand what's going on. I considered adding an option to "view own posts/threads", but is seems like adding a "node exists" permission would be better and easier to manage long-term.