No one is claiming that, in a perfect world, this would be Cloudflare's problem. Some other authority would step in and take care of it I suppose. But we don't

No one is claiming that, in a perfect world, this would be Cloudflare's problem. Some other authority would step in and take care of it I suppose. But we don't live in a perfect world. It's a pretty weak response to say "this should not be their problem" - because, for a bunch of reasons, it is their problem. There are bigger, harder questions along the lines of "how do we as a society deal with this kind of issue." Cloudflare does not need to solve the general case before it deal with the specific actions of this specific website - and the desire to solve the general case is not a defense against confronting the specifics.