I assume there is some fair use cover AV providers could argue ("purpose and character of use" sounds like their bag) but I'd be surprised if many authors want

I assume there is some fair use cover AV providers could argue ("purpose and character of use" sounds like their bag) but I'd be surprised if many authors want to come out of the woodwork to fight that fight with them in the first place. As we can see in this case, it's a big deal that the author is seeking copyright takedown.