I came out on Facebook, after telling my 20 most important friends in person. I didn't set my preference to "gay", I just wrote it in a picture, in the hope that Facebook itself would have a harder time registering this information. Therefore I don't think I qualify for their stats. From my experience the guesstimate of 10% people being gay is close to the truth, so Facebook is missing 30m gays in the US...

Concerning privacy, on the other hand, Google Reader, The Old Reader and Tumblr have extremely precise details about my tastes. I wonder what my profile at the NSA looks like: My facebok is registered under a false name against an email which is now defunct and I browse it in a separate Chrome profile, but they could easily recoup me if they notice I use the same camera to post on facebook and other websites.

Or Facebook could notice I browse gay friends with more interest ;)