You're not wrong, however the question is, what ethical role does Facebook have to inform their users about how their data is used/transferred, or to educate users on what they are agreeing to?

I don't think there is a "right" answer here that solves all of the problems.

For example, should FB be required to explain to my technically illiterate Aunt how images and text are used to train feature classifiers, which inform the social graph?