Not trying to be funny at all with this comment.
Blocking websites blocks speech. Speech is generally defined pretty broadly in the American court system and this seems pretty clear cut. If you can't censor music or stop people from wearing certain clothes then I think blocking websites looks a lot like censorship of speech that should be free.
IANAL, but I think (and hope) there would be legal challenges to a law like this.
What a shitshow streaming is. So glad I'm not funding it at all.