I have seen very few antivax arguments made in the spirit of science. Those that were got repeated lacking the original comment’s nuance.
Keep in mind that the spirit of science was developed with the gates of wealth, literacy and education in mind. Remove those, add in anonymity, or even pseudonymity, and the system veers towards chaos. We are far more open, today, than the Enlightenment-era West was. That requires new tools and guardrails. (What this discussion, broadly, is about.)
I don't know how many people have gotten banned over this (though I'd guess nonzero) but it shows just how easy it is to fall under the new draconian speech policies enacted by the majority of social media.