I did not say that I fed it with any real information about me. About the only thing they got was my e-mail address, and they could have gotten that with a better webcrawler.
Did you friend any of your IRL friends? Because if you did, that would probably be enough for them to cross-reference enough data to figure out who you are. It occurred to me that even when people tag pictures with unlinked text (as they sometimes do to be funny or if the content is sensitive), Facebook could probably use some fuzzy matching and heuristics to map those faces to real identities elsewhere in their database.
...if you think about it, that's probably an easy way to get a lot of photos of people that they don't want to be seen.