Excellent idea, Harold. I'll try this out, maybe it even corresponds to my signal-2-noise matrix: noise=show nothing, dark chatter=show some posts, dark chatter=show most posts, signal=show every post; since the dark matter and chatter are not visible, maybe we can add topics or hashtags to the dark circles (I need to dig deeper).

https://plus.google.com/100641053530204604051/posts/WeAA2VQTeYV