I get email of users by Facebook Graph API, but how can I verify that the user has confirmed his email after registration on Facebook?
I tested this scenario by creating a new Facebook account and attempting to connect it to sites without verifying my e-mail address. The Facebook dialog did not allow me to do so, explaining that I must first verify my e-mail address before connecting.
Thus, you can rely on e-mails retrieved from Facebook to be "verified" sans policy changes.