Sometimes it happens that we are not willing to communicate our login email when committing.
While it is always possible to create a "dumb" email and add it to verified email, it could be cool if account can come with a preconfigured email.
Let say something like : {{username}}+noreply@{{phabricator instace domain}
Github has a similar feature https://help.github.com/articles/keeping-your-email-address-private/ and personnaly, i'm using this a lot.
Of course this can be part of a much bigger project {{username}}+xxxx@{{phabricator instace domain} are routed to compherence, but it is another story