You also won't stop such types of content from appearing on said platforms, less popular but still they will appear, get popular and get closed down. But that's an issue with some types of content that all social media platforms have.
No solution will be 100%, let's not presume that there will ever be 100% solution. Though is this the best approach. Exposing and debating head on would be the better solution and this eliminates that.
ugh there are literally people who think the Earth is flat. There are literally people who think the Earth is flat!
True, should they ban that as well? Though they havn't been going around flattening mountains or any other harm, so there is that.
Not all those who believe conspiracy stuff, act upon it. Some will, those are more the ones who will engage in lesser, more niche platforms in which such content will run, along with more such content. Thus, driving many who will want to watch it to be exposed to other platforms in which such content is less tacked as more echo chambers and this is not something to be overlooked.
Thing is, whatever you do, there will always be some and with so many humans, the odds of there being more than one is a given. Do you ridicule/educate in public or cast aside to dark corners in which they can carry on unchecked.
Maybe the right action for this, maybe not. Hard to really measure it beyond cell tower death rates and I'm fairly sure we have past the peak upon that surge.
This is taking away their access to a platform that has global reach. They already had platforms where they didn't engage in debate, btw; they're called youtube channels with heavily-moderated chat sections. Except there they can reach millions of people.