BP Daily: Hiding BuddyPress nav bar to vistors

How can I hide the BuddyPress navigation bar to site visitors or non logged in people. People not registered have free accesses to my members list and activity stream, etc. I don't want to this.

I know I can hide the admin bar, but need the member not available to these people. I don't see the possibility in BuddyPress, can't find a plugin that does this, so though perhaps it can be done in the theme.