I hate to play the paranoia card, but this reads like a push from the government for Facebook to start cataloging people. If it wasn't happening already, this is probably the missing piece in court evidence to show that a person is who they really are. This is really, really dangerous (especially when the majority of their users probably aren't bright enough to understand the implications).
You mean, they needed something other than your birth date, birth place, real name, current residence, work history, current job, name of your parents, cousins, grandparents, not to mention the rest of your graph, to correlate you to a database somewhere?
Until now-ish (or the near future), FB had no way of verifying that, or forcing me to!