I have G+ in principle, but never look at it. FB I use actively, but with real name, and would not tie it to my activity here. I think the "real name" issue is a big issue, actually - it genuinely can be difficult to say anything suggesting that you have an HG+ child in a context where anyone who wants to can identify you and the child. And many people, including me, have FB friends who are actually mere acquaintances. That's going to make G+ or FB quite tricky for Davidson to use well. E.g. I know your DI page is there on FB, but I haven't liked it, because if I did FB would advertise that to my FB friends, so I don't see what's on the DI page routinely!
