[Lamplighter]

I have no idea if this is relevant, or not, but....

ZD Net
Violet Blue
June 23, 2013

Anger mounts after Facebook's 'shadow profiles' leak in bug

According to Reuters, the data leak spanned a year beginning in 2012.
The personal information leaked by the bug is information that
had not been given to Facebook by the users - it is data Facebook
has been compiling on its users behind closed doors, without their consent.
<snip>
According to the admissions in its blog, posted late Friday afternoon,
Facebook appears to be obtaining users' offsite email address
and phone numbers and attempting to match them to other accounts.
It appears that the invisible collected information is then being stored
in each user's 'shadow profile' that is somehow attached to accounts.

Users were clearly unaware that offsite data about them
was being collected, matched to them, and stored by Facebook.
The yearlong gap of exposure as described by Reuters creates a scenario
of horrifying possibilities for any woman who has begin to experience harassment,
abuse or stalking by an ex within the past year. Or, anyone being maliciously stalked
and harassed by a tech-savvy aggressor (or a stalker's Facebook sock puppet)
they may have accidentally friended over the past year.