We shouldn’t give up the Internet, but last time I checked we already do absolutely zero in preventing any kind of porn. Simulated child porn is already out there, currently in the forum of crazy Japanese anime. Has been for decades.
Currently the FBI can nab perverts in the US. But there will be no obligation by servers to cooperate with the FBI now. We might not even know if the servers are in US territory.
We also have the legal right to disrupt snuff films etc via legal sabotage. That will be up to the whims of international perverts.