I think it's just something that happens with growth. At first it's a small group and it's cool, then your group gets larger, it's still cool, but now more to manage.. then at some point the group gets so large that unless you're trying to push something, there's often very little that you want to say to your 3rd grade teacher, some guy you met on a bus, your old roommate from ten years ago, your boss, and your grandparents all at the same time.