"Much like MySpace, it seems, users are learning that having 100,000 “friends” you’ve never met is much less valuable than connecting with a select number of people you know well."<p>That's hardly a new discovery; I remember when I first tried out this "Internet" thing in '95 I subscribed to all mailgroups I've encountered just because I could and it felt cool to receive mail from people in places like South Africa.<p>Obviously I quickly learned that it wasn't a very good idea but the point is that the concept of reducing spam by not giving out your contact details to anyone (or in the case of social networks, not following / accepting as a friend anyone) is not new at all.