I guess I agree, but in 20 or 50 years a statement like "we exist mostly in meatspace" could be plain wrong. Who knows? Purely speculative, but at that point we may regret not demanding more accountability of those domains we once dismissed as just "Internet things".

Another unspoken difference between the way this circularity ('you get what like, you like what you get') plays out in meatspace versus on facebook is the level of transparency and control. When you (read: "we") surround ourselves with like-minded people in "real life", you are somewhat conscious of the fact that a selection has taken place. If you ask most people, they would say they "chose" their friends, indicating they were in control of that process. The newsfeed and its underpinnings, by contrast, are opaque. Savvy users (like ourselves lol) realize that facebook has taken the liberty of culling and curating content, but your average user is in the dark not only when it comes to how that culling works, but may be unaware that it's happening at all! (At the very least, hasn't put much thought into how/if facebook does what it does.)

I hate to take a page from Donald Rumsfeld's book (of all people), but I'd rather deal with a "known unknown" than an "unknown unknown". As it currently stands, the newsfeed operates precisely as an unknown unknown.