When that little blue "Sign in with Facebook" button first appeared, it was a little creepy. Who wants Facebook to know about every single service or app they are using online? Well it turned out to be an amazingly convenient tool—or some of us see it that way. No more forms!

But, uh, it seems like using Facebook to login into Monster might not be the wisest move for your career. And if that's the case, where do you draw the line? Do you ever actually sign into online services with Facebook?