Main Blog Not Updated?

Using multisite privacy options as I want my main blog to be for the admin/developers only and want it to be completely private. But the plugin says "Updates all blogs with the default privacy setting. The main blog is not updated." Does that mean this won't work on the main network root site?

Is there a way around this one?

I made sure my other browser was completely logged out, I then went to the home page of the root site (the one I marked as completely private) and I was still able to see the site and browse the blog. I assumed it would simply redirect me to the login page. Is this not the case?