Let me take a stab at the possible correlations .... men who have more women friends, and gay friends, are more likely to be gay than men who have men friends.

Does this get me an honorary PhD at MIT?

How about this, if you've got a Facebook profile you're a flaming homo?

“Certainly if most or many of your friends are of a particular religious or political or sexual category, others may conclude you are part of the same category - even if you haven’t said so yourself.”

What a scoop!

I'm sure the actual algorithms are very fancy, but putting it like that is not selling the workmanship.

Wow, just think... if the Nazis had this how many more homos could have been sent away to concentration camps. Let's just hope it's... accurate? God forbid I have a bunch of gay males and straight females for friends but I actually have sex with women... yikes! I could be mis-outed, just for breaking a stereotype!

"...inadvertently..." would be better than "...unintentionally..."