BuddyPress.org

Great question. Jeff Sayre had the privacy plugin of 1.1.x but won’t release a version for 1.2 just yet.

http://jeffsayre.com/2009/12/05/buddypress-privacy-component-released/comment-page-1/#comment-531

I’m confident, when released, it will provide some much needed privacy to BP.

I’ve heard that the following plugins may help bring some privacy to BP, but I haven’t heard which one users find the most effective or are compatible with BP 1.2:

https://wordpress.org/extend/plugins/registered-users-only-2/

https://wordpress.org/extend/plugins/registered-users-only/

https://wordpress.org/extend/plugins/members-only/