BuddyPress.org

the reason you need the 1st part is that if you do not do it, when you click the Tab “All Members” you will still be served the unfiltered all users activity stream. that’s the behaviour that I have witnessed on my site at least.

So it seems that the first function is blocking everything that is not “me or friend” to be shown.
And this is what I wanted, this is how the other networks also work.

Works beautifully now