Service providers have already been policing websites. It didn't start with kiwifarms. If you go on twitter and look at the profiles of registrars like namech

Service providers have already been policing websites. It didn't start with kiwifarms. If you go on twitter and look at the profiles of registrars like namecheap, you'll often see them stating they will drop service to websites which are accused of being scams, spam or otherwise malicious.