[yaix]

>Also, Facebook users have opted in to Facebook, and its data storage "tactics"

Not always.

Facebook stores data of people that are not even members, using tricks to make their real-world friends submit that kind of data. Upload you mobile phone contacts, find people from you Gmail address book on Facebook, etc.

So Facebook may well have lots of data about you, even though you do not have an account or any knowledge of that profiling.

(OpFacebook is stupid anyway)

[freedompeace]

They aren't tricks. Inviting your a friend to Facebook via. email isn't a trick, and keeping a record of it so that Facebook can notify both parties that the request has been accepted isn't a trick, for example.

It's still, nevertheless, far less than what people put on Facebook themselves. It might be comparable to me asking my friend about this person I saw the other day. Her friends are giving me that information. Though, as the person, I wouldn't appreciate my information shared, it's something that happens often in the real world, not just Facebook.