Hello everybody! I found one bug in privacy of our forum.
As we cannot show private topics to other roles in the read-only or topic-only mode, I wanted to create two topics. One "Name" for target roles and other "Name(private topic)" for guests only. So guests can see that forum is much bigger but it has a lot of private topics. So I created it in such way, and set privacy for guests only. And when I checked it by signing out - not topic at all. The function for guests only is not showing topic for guests.