Again, this is hard to imagine wanting to do especially for privacy reasons, but were things like facebook and twitter easy to imagine in the 80s? Much easier

Again, this is hard to imagine wanting to do especially for privacy reasons, but were things like facebook and twitter easy to imagine in the 80s? Much easier than the example you give, yes. Considering things like Xanadu were already theorized in the '60s, Facebook and Twitter wouldn't be that huge of a stretch. What's more, Usenet and BBSes already existed in the '80s, so there was a text-based glimpse of the future in some way. Of course, imagining the scale, deep technical details and the heavy use of graphics back then was likely difficult. But the general concept? Hardly. Especially not something as simplistic as Twitter, the idea of it was most certainly not alien back then.