Call me a utalitarian, but I find it silly to blame the technological advancements in communication technology for the degredation of social interaction. Instead of demonizing the tools, I think it far more meaningful to focus on the basic human nature at the root of the problem. I think we, as a species, are sufficiently capable of metacognition to see that we have created a world for ourselves where the base instincts that govern our social behavior are becoming incompatible, disfunctional, out of context of the primal world that created them in the first place.
Facebook isn't exactly high-volume sensory interaction, but it's marketed heavily as a replacement, and the idea appeals to our sensibilities. We know we can empathize with people 'online' - that isn't anything special, we do it without the internet all the time by thinking about people. So in comes social media, which is supposed to connect us. It has our friend's name, right there, and a picture of him posing with his widget! We've known him since we were in Highschool! That's our friend!
But all we get from him is meme images. He doesn't care about us. Or maybe he wants meme images back. Post meme images!
You mention Calhoun. Yes, we're animals, with weird squishy biological animal motivations that interact to form our behavior and societies. That doesn't mean we
can't understand each other - we're all the same species, after all, and we at least know ourselves. We also aren't mice, which is probably the most salient rebuttal to his experiments. Mice don't use tools. A tool, improperly used, can mess with our ability to understand each other. Hell, a word improperly spoken can mess with our ability to understand each other. We strategize from birth methods to communicate with our parents that we need food or comfort - you could teach a baby that the way to get fed is to do endless baby-acrobatics, and they'd do it, because it's now their word for 'hungry'.
Sometimes those strategies fail. There are a lot of circles where the only option is belonging and actively participating in a social network - you might as well be invisible if you don't. We've never had anything like that before - it's the equivalent of having an entire culture run by passing letters under semiopaque plexiglass boxes.
You can't touch someone through Facebook. At the same time, can you blame people for expecting that level of sensual connection from a block of text on a screen? It's a very easy trap to fall into, because the convenience of not having to make a trip to their house would honestly be pretty nice if it worked. No, really, why not? Telesex? Sign me up! But it just isn't as good as it's been hyped and proselytized as, and that
is dangerous. Think about if Colt marketed their guns for surgery. Social bonds keep us from collapsing into despair - if we're using shitty tools to make them, we're going to have, on average, more people with social problems.
I have a few friends that've let it become their soul source of empathy for 'the human race' (they say this as if they weren't human, complete sense is made!), and it isn't pretty. I don't think it's our only problem, but I definitely don't think it's helping matters.