I'm having trouble discerning your point. Can humans collectively believe harmful things? Of course. But it's a fundamentally different problem than censorship, except insofar as censorship can influence people's beliefs. It's not something you can really legislate against.
You juxtaposed the censorship with rational actors that are collectively taking action to protect themselves. I'm juxtaposing with irrational actors that are collectively taking action due to superstition and fear. My point therefore is, why do you think this censorship case is the former and not the latter?