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.
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.