It would take a hell of a heuristic for facebook to fill in holes in the social graph. Without some very intelligent fuzzy name matching, facial recognition, a

It would take a hell of a heuristic for facebook to fill in holes in the social graph. Without some very intelligent fuzzy name matching, facial recognition, and textual analysis of your friend's profiles and walls (if you ever are mentioned), not having a profile ID basically means they have nothing on you that can be extracted in an automated fashion. A human investigator, however, would be intelligent enough to build a profile on you from your friends' submitted information, so there still is some cause for concern. But at least you are safe from datamining.