No fucking way do they get mine. I'll tell them I don't have a Facebook account. If they want to go as far as to find me, check the pictures, and say "Oh yeah, what's this?" then they can call me a liar. If they do, fuck 'em, I won't work for them.
I know, easy to say since I have a job right now. If I were unemployed and they were the only ones offerring me a job, I might feel differently, but probably not. No, I have absolutely nothing in my account that's illegal or that I'm even ashamed of, but it's the principle. My private life is exactly that, and I share it with who I choose, not anyone else.