At that point why bother with cloudflare? if you have a credible legal case to take down the hosting of the website you make a legal case in the place where it is being hosted and use that to get it down. I can't really see any reason for a court of law to force cloudflare to not service someone given that the obvious implications that the one asking for that to happen wants to commit a felony, or at the very least make the target susceptible to one, assuming cloudflare isn't hosting anything of course.