Quad9 is special in that it's the only recursive resolver of any size that's not headquartered in the jurisdiction of the Northern District of California federal courts. All three others of the "big four" are, and Quad9 was until it moved to Switzerland so as to be bound by criminal privacy law, and to get out from under USG data-collection requirements.
But Quad9 is _not_ the only one being attacked by Sony. Sony has already won against Cloudflare in other venues, but that's a much easier target.
https://www.musicbusinessworldwide.com/italian-court-orders-...
https://dimitrology.com/cloudflare-wants-to-eliminate-moot-p...
Quad9 doesn't sell hosting services to pirate sites, so has no connection with the alleged infringers. Which is the point of all this. Quad9 is being attacked _because_ it has no relationship with infringing parties. If Sony can establish a precedent that Quad9 can be forced to censor, then that precedent is, in principle, applicable to all parties. Firewall manufacturers. Operating system publishers. Wifi hotspot manufacturers. Open-source software authors. Etc.
