Earlier quoted context omitted.
For those who have signed up. What about "shadow profiles"?
It seems that the term "shadow profile" refers to a feature where Facebook retains contact information uploaded by other users in order to recommend them as friends if/when you create a profile [1]. For all the fear associated with the term, that's pretty benign. Is there any evidence for a link between these "profiles" and some of the more egregious claims of privacy infringement? [1] https://www.zdnet.com/article/f…
And of course, the shadow profiles would have had names, email addresses, phone numbers, and linkages that could help answer questions like "mother's maiden name". If shadow profiles were included in the recent huge leak then people who had not ever touched nor wanted to touch facebook, may have just become easier social engineering targets.