I had a Facebook "friend" take some kind of silly survey and posted that I was a liar. When I questioned her why she would do that she said, "It was a just a joke, everybody that knows you knows better." I reminded her that I was looking for a job and a prospective employer did not KNOW me. I immediately blocked everything/everyone on my profile. Linked In is strictly professional info. I do my keeping up by e-mail only.