I think if that were true, there would have at least been an attempt at a court case at the very least. But AFAIK every case they have been involved in, they've won. I am not defending their content, merely a right to exist, especially when you're not breaking any applicable laws.
If you want to talk about content that objectively breaks laws... 8chan hosts monkey torture videos.
I think if you want cloudflare to host your site, don't kill people with your site. That seems fair IMO.