Hey, I am a moderator on a large vB 3.8x site (~19K members) and I am wondering if it's possible to set up member groups that members can join or leave on their own, without having to be added or removed by an admin. e.g. if members want to view topics/etc. in the off/topic forum, they could add themselves to the off/topic memgroup and get permissions to view the board/post threads etc.