Forum is created with the access only by members
(those who have username). Another forum is public.
Displaying of forum lists works fine - displays accessible
forums and doesnot display non accessible forums
depending of user login status (or being anonymous)
However if some board in "protected" forum is very
active place it would list in top 10 section.
Anonymous user can jump to active boards and posts
in "protected" forum regardless of access limitation by
selecting link in top 10.
Top 10 should possibly take in account access
limitations to forum (better) and not list them or
displaying of posts/messages should check if such user
have right to access particular board/message (fair