Users can self-select. We can always just yell at Timmy who shares too much or outright unfollow him on Facebook if we don't want to see what they share.
I suggested that just because someone posts something on their Facebook wall, it doesn't mean I will see it. (This was around 2009). People often looked like I was saying something insulting. I think they'd understand things the other way around but I guess they don't see themselves as noise. There is some user education that the network needs to do.
In any case, be it Facebook or SharePoint or 37 signals, there should be zero obligation for anyone to look at things you post.
If you are having a baby shower and don't invite me personally and just write on your wall, that means you don't want me there.
I still believe in a 100% non-intelligent newsfeed. Ben Evans is wrong and I'd even say malicious for dismissing the idea of a reversed chronological newsfeed.
The only reason this is a problem is Facebook desires to inflate the number of connections. Let people cull their newsfeed and they will. Set expectations for posters that their posts may not get to everyone and they will understand as well.