See, I think an immediate block with no acknowledgement gives off a much greater appearance of touching a nerve than a polite reponse. I can see a troll laughing at how scared the OP must be to have done that. I can't see a troll getting a kick out of a response like the one I posted earlier in the thread. Even so, like I said, I'd rather risk feeding a troll than blowing off someone I once knew, and I can always block them after the second message, if it's not to my liking. YMMV, of course.
And yet, here you are, responding to me, whom you cannot identify through name or photo, either!
But seriously, you asked a question that had previously been answered. I get that you disagree with the answer. No need to call people fools, foolish and unreasonable. I find your posts here to be much more rude than what was said to the OP on FB.
The OP said that she "drastically dialed back" her facebook privacy settings. It sounds like the person already had the chance to see all there is to see on her facebook page. One response isn't likely to tell the person any more than she already knew.