Reading the suit, it is interesting that it is very much based around the fact that Quad9 already blocks resolution for "malicious" domains, and therefore already has a censorship process in place. Basically "you're already censoring, one more domain won't hurt."
That's the assertion Sony makes, but that doesn't actually make it true. Quad9 doesn't do any blocking, Quad9 relies entirely upon third-party expert malware analysts to define the blocks. Quad9 only decides what _not_ to block. Also, Quad9 blocks the same malware and phishing everywhere, because we don't know who or where users are. So Sony asserts that this is possible, but they certainly don't demonstrate how it could be done, much less who would pay for it.
