This idea has been merged into another idea. To comment or vote on this idea, please visit K12CO-I-60 Bulk subscribe / unsubscribe to notifications: better notification subscription management.
Many schools are setting up notifications for hundreds of parents one at a time, to ensure that they are getting the right options selected. This is a very time consuming process. I understand why you don't allow this for text messages, but if we can bulk subscribe people to get pushpages, this really isn't any different.