Rp Tutorials

I apologize ahead of time if this is in here but I swear I've looked under every tag I can think of and could not find it.

When setting up a site map, I've noticed that a lot of games nowadays have the posts of the comm hidden so only the site map shows. When you click the links, though, everything is clearly visible so I know they're not being marked as private. Where would I go to make this happen so the posts are "hidden." Examples are: [Bad username: commandpost"] and boardwalkmods. I think it's a great effect but apparently I am not smart enough to figure it out.