Facebook only gives you information about a visitor if they are BOTH logged
into Facbook and have registered with your appid. So it is impossible to
differentiate from cases 1 - 3.

"Facbook" should probably be "Facebook" ;-)

Patch attached.

CommentFileSizeAuthor
facbook.patch692 bytesunleet

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unleet’s picture

unleet commented
Status: Needs review » Closed (won't fix)

I just pulled down the dev version, and the passage in question is gone from the README file.