One advantage is that all Boffery accounts are private. No one knows you have an account on Boffery unless (1) they email you a friend invitation on the site and (2) you accept. While this only protects against certain forms of attack, it does make us a slightly less inviting target. There is no Barack Obama or Kevin Rose of Boffery until they choose to publicize their accounts elsewhere.
Plus we will not use a dictionary-searchable admin password. Ha.
I'm sure I will waste all my karma this fall asking HN to pick apart our security plans. But for now, I just wonder if choosing sex as the test of this sort of high-security, process-intense visual social network format wasn't just the thing to keep us from scaling TOO fast to keep up with reliability and security.