It's not really a problem for me, with my single-digit Twitter following, but anecdotal evidence shows that once a social networking community gets too big, the back-and-forth that created it evaporates. What I'm saying is, Ashton Kutcher is very lonely.
A Wired editorial defends the idea of online obscurity, that those smaller groups and their casual sense of community have something that should be admired and retained. Once a group gets too big, members fade into the background, not wanting to speak in front of such a large audience, and in the case of Twitter, the person being followed becomes larger than life. It's an interesting idea - should we be more vigilant in protecting the small groups of which we're a part? [Wired]