I don't have any specific suggestions, but I do want to give thanks for implementing functionality to block pushes if the email field is *not* using an anonymized mail address.

It's one thing to offer anonymous e-mail addresses, but it's also awesome that GitHub can help prevent mistakes that would otherwise leak a user's e-mail address. I am not sure how many people try to be privacy conscious on GitHub, but I assume most users don't, so it's nice seeing this little feature exist.