I'm not so sure. Those are all things that most people consider to be bad, and that most countries have laws banning, or there's at least enough overlap between countries and languages to keep it mostly out of the mainstream internet content in certain languages.
These work because South Carolina doesn't have to "police the internet", instead things like FBI takedowns work, countries spend a lot of money on targeting trafficking organisations, and because companies like Twitter/Facebook/etc have some respect for national governments where they want to be able to conduct business.
What are SC going to do in this case? I guess they could prosecute sales of ads for these websites by companies based in SC, or maybe prosecute hosting providers in SC who are hosting these sites, but these are pretty weak actions.
Unless a large number of other governments get behind them, or they decide to build a Great Firewall of South Carolina this is going to have roughly zero effect.