Been reading the forum for a while and thought that I had to comment on the FB discussion.
Re FB; if someone posts on a subject matter that is public, with their correct name and picture, then it is their own fault if their info goes public and it is not illegal to make such public. Any prognostication that says otherwise is pure unadulterated BS.
To keep one's real ID private; post under a pseudonym. If an author wants a subject matter within a private group, FB allows that.