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don't make that information public, and don't friend people you don't know and you will be fine.

You forgot: Make sure you stay logged in constantly, checking for changes, just in case Facebook change their privacy settings again and make stuff public that previously wasn't.

A brief synopsis of sexual predilections would be nice, too.

A team from MIT did that already. Mining is easy, and even easier when FB provides so much.

The layout of that block smells like Flickr-envy.