I was quite relieved today to get a friend request on FB from someone I know - recently I've been somewhat swamped by requests from people I've never met, but who may well be mutual friends with others. On the other hand, some of the others with whom they're mutual friends may have "friended" them indiscriminately, so that's no help at all, really.
But I've had no problems with using my real name here on Mudcat or there on FB - I don't, though, put my phone number on for everyone to see or my full address. Or my full date of birth, for that matter.
I find FB entertaining and it's enabled me to catch up with all sorts of people who I had lost touch with.