Re: Facebook's shadow profile.
How did you formulate the request?
If you asked about yourself, sure you got a No and it is "true".
If you asked about "person X" appearing on the photo from yesterday posted by Facebook luser Joe Average in the right top corner - Do not think so. They do. They do not need to perform the final identification to serve their customers. They need to supply all the relevant data about you, your family, where you kids hangout, where you cross the road, etc as well as enough data which will allow the customer to identify you themselves. Thus they can pretend that you are an "unknown" to them.
Unfortunately, the only one who can put sufficiently spiky gloves to grab the slimy eel and make it spit out the real truth about the "additional non-user related data" is a major government. Nothing less. That has not happened. Yet.