I have WPForo installed on a website that you have to log into, so the only people who can view the forums are registered, logged-in users. Yet I still see "guest" viewers. Wondering how I would track this down, and why I would have "guests" viewing the posts when you have to be logged in. Any help is appreciated.
I guess you've done wrong permission configuration.
Please provide us the example URL and leave the screenshots of the forum and category permissions section.