Ok so maybe I'm alone here, but this doesn't bother me at all. How is this an invasion on anyone's privacy? They are just using the info a user already gave them access to.
Why does it matter if Facebook has information about you you can't see? Is it really surprising that they do? It's not like FB just shows us the DB tables so that we know what info they are storing on us. As programmers we should all understand that there is some data that you keep that doesn't need to be shown to the user but helps make your program run. That's all I see this as.