Then there are those of us who have unique enough names that you can pretty much look us up and find there's only two in the whole US (and we're related). Having been a DBA at one point, it's always fun to tell folks that "really, if you just search for my name I guarantee you'll find me faster". Heck in most cases a search in a system that separates first and last names will let me be found with just my first name. If it weren't for that lousy Welsh actor, that would work on Google also (although full name turns me up as most of the front page).

My point is that this shouldn't be THAT surprising. I suspect full name and gender would uniquely identify a fair portion of the US as well. We're not as homogenous as some societies and I think this proves it...