pennersr/django-allauth — pull request #150 by kriwil (2012-12-03 01:03:39+00:00)
Title: Added ability to have blacklisted username

Added ability to have blacklisted username using settings.ACCOUNT_USERNAME_BLACKLIST list.
So when the username provided from socialaccount is in the blacklisted list, I set the auto_signup to False to it will go to the username/email form.