Change notification settings?

To make the default subscription settings more aggressive you can edit forum.models.user.SubscriptionSettings class model and change the values of the default attributes.

member_joins = models.CharField(max_length=1, default='n')
new_question = models.CharField(max_length=1, default='n')
new_question_watched_tags = models.CharField(max_length=1, default='i')
subscribed_questions = models.CharField(max_length=1, default='i')

#auto_subscribe_to
all_questions = models.BooleanField(default=False)
all_questions_watched_tags = models.BooleanField(default=False)
questions_viewed = models.BooleanField(default=False)

#notify activity on subscribed
notify_answers = models.BooleanField(default=True)
notify_reply_to_comments = models.BooleanField(default=True)
notify_comments_own_post = models.BooleanField(default=True)
notify_comments = models.BooleanField(default=False)
notify_accepted = models.BooleanField(default=False)

send_digest = models.BooleanField(default=True)

My quesion goes further: How can I enable all these notifications by default? By now, once a new user registers, notifications are turned off and need to be turned on manually through the "start/stop notifications" button in the "user tools" -> "email notification settings". Thanks!