What am I missing? Why is "on Facebook" part of the question? Is "Facebook" really adding something here? Is the answer different if I put in IRC, Quora, NNTP?

What am I missing? Why is "on Facebook" part of the question? Is "Facebook" really adding something here? Is the answer different if I put in IRC, Quora, NNTP? Edit: Note that I know that the article uses this headline (so I'm not trying to blame the submitter). I just wonder if this is useful?