Just for the record I DO have a Facebook account. But this was largely this was due to my daughters wanting to keep in touch and a local circle of theatre friends who all used it. I don’t use it much myself and only look at it once in a while.
To me, these social networking sites complicate an already busy life. As an academic working at a University I already feel I’m drowning in information. More than I can handle already! Do I want to be constantly reading/checking tweets on my mobile (particularly work-related ones)? I don’t think so.
Vintage computing is a special hobby of course, and this forum connects me and others with people with the same interest. I’m also active on the International VCF. It’s certainly a social activity, but not in the all-pervasive, fast moving way Twitter and Facebook are. If I was RETIRED on the other hand, it might be a different story. Then I would have the time to internet-socialise far more.
Maybe I’m just getting old, inflexible and curmudgeonary

Anyway, I’d be interested in any thoughts on how others view the phenomena of social media.