If your concern is what forums have what permissions, then you should simplify the permissions... All of of the public forums here have the same permissions, and all of of the private forums here have the same permissions; there have been 0 problems over the years here for us, and this is the first time I've ever seen a user report having such issues.
If you're wanting to change ONE permission for EVERY forum, you're using the wrong tool.
CP -> Permissions -> Groups
See the "Edit Permissions" section on the right.
