Based on reading another post here, I think other e-mail addresses can still be retrieved via Facebook APIs if the user grants permission for them. I was think

Based on reading another post here, I think other e-mail addresses can still be retrieved via Facebook APIs if the user grants permission for them. I was thinking only about the timeline display and the general open graph use cases and neglected the "give extra permissions" open graph use case. Still, I don't see a good reason why there would be differentiation between what is displayed and what is given by the UI (after accounting for who is being shared with) for e-mail addresses versus those other fields.