[membership] How to Turn off BuddyPress to Strangers

It seems that creating negative rules for BuddyPress pages is having no effect to the Stranger level. The Group and Private Messaging control rules work, but not the pages.

Ideally, I'd like to close of my 'Community' blog features to strangers, apart from an introduction page which leads to registration. I don't want the public viewing any content about members, activity, groups etc.

Is this something I should control using the Membership plugin or is there another way which allows the public to see its there but not view the detail?

thanks for any help.
Paul