I can definitely see both sides of it, it would protect many people, and no malice was intended but they need to get consent as they don't have the right to deprive users of the service they have paid for. I wonder if there might be a way to exclude business users. What should have happened was that they should have got in touch with their customers before doing anything.
Having said all that, I can't say that I wouldn't have ordered the blocking myself if I were in charge.