I read somewhere here, that the BP team is planning to add privacy options in future releases. I have no idea if they’re going to include these things in it, but I hope so.
I also found out that the RUO 2 plugin isn’t an option for me. I didn’t take a look at the s2members plugin yet.
Before I used the WP sentry plugin. This one works for Posts, but it also hides the menubuttons for pages if you’re logged in. So ome changes for this plugin would be helpfull too.