The argument can be made (at least in our industry) that someone who uses Facebook isn't someone you'd want to hire, anyway.
I'd say quite the opposite. It's normal and expected to be a member of multiple social networks. I'd wonder what kind of IT person doesn't have an account with facebook, twitter, a personal domain, etc. Nice ludditism, though.
I don't understand neither sneak's position nor yours, really. What exactly is odd about not wanting to feed the privacy black hole that is Facebook? I have nothing against those who do, but frankly I'll avoid it if I can.