Re: privacy issues
I’ve not tested it extensively yet, but this plugin:
seems to allow the blocking of all users, except the registered community, from viewing anything related to buddypress.
If I set “I would like my blog to be visible only to registered users from blog community” for the main/first blog where all the buddypress features sit, then you have to login before being able to see anything except for blogs, which have their own privacy options.
Is it really this simple to create a private social networking community but allow the blog privacy to remain under the control of the blog owner? I hope so. Perhaps someone can test and verify this?