That said, I don't know how you would monetize a system like that.
Furthermore would you really want to? Seems to me part of Facebook's (and other popular social media platforms) growth is attracting advertisers with access to user data personalization.
Consequencently this set up leads to people (at least geeks/nerds) boycotting or giving up on Facebook due to information mining and obnoxious advertising.
Then those aforementioned nerds/geeks make something new that begins the cycle over again.