"I follow Danny on Google Plus, and filed him away in the appropriate circle."<p>He's doing it wrong. You don't file people by their interests, you file people based on how interested you are in them. I have family, close friends, acquaintances, and people that i'm following who I don't know. The main problem with Facebook is the large number of people who I'm connected to (and want to be connected to), but I don't care about their status updates.<p>Most people end up going into acquaintances and 'following', but that is how it is in real life too.<p>My close family and friends group has plenty of action, because I have stuff to talk with them about.<p>Tagging posts or users based on what it is about is ultimately an intractable management problem for the end user.