Not trying to be pedantic here. It's just important to sort out the terms used if any analysis is going to be useful. What's happening on facebook is not social. It's bits of data around being social. Different thing entirely. Perhaps we need a new term for whatever it is, but whatever we call it, it's not the same as face-to-face real socializing with real people.
We assume positive intent online because otherwise we get flame wars, but there's a helluva lot of body language and inflection that can take the comment you made and make it mean a dozen things. All of that is lost. And all of it is important.
In addition to the nuance, would I know severine if I saw them on the street? Miss them if they died? Remember the nice way they did X everytime we met?
We are exchanging written opinions and statements, yes. These exchanges also occur in social interactions. But we are not socializing. There's no bond here that's become stronger, no subtle nuance or interplay that we're managing at a subconscious level. For all either of us knows, the other one is a bot. Or an alien. There's no humanity here.
Let's take our relationship, for example. I've been cohabiting some of the same online spaces as you for at least the last decade. For me, you are a valued part of that ecosystem, more so than most of my physical neighbors who I chat with in person a couple times a year.
No, I wouldn't recognize you on the street, but I struggle with face blindness, so it's a weak criterion. Would I "miss you" if you died? No, but I'd certainly reflect sadly on your death if I learned about it. "Remember the nice way you did X"? No, but I have trouble coming up with such an X most people I interact with locally.
There's no humanity here.
I'm surprised you would say this. Is this a recent change in your view of online interactions or have you always felt this way? Quantitively I find about the same amount of humanity here as I do elsewhere, and qualitatively I prefer many things about what I find here to what I see when I go out in person. Are you OK?
(ps. I notice that many of the links in the sidebar of your site are broken.)
The fact is that large and increasing quantities of our social communication now occur online.
I'm not claiming this is salutary or calling it a good thing. I'm just stating the fact.