I think the free speech of posting coronavirus facts is far more important than the danger of dealing with the parler crowd. For people in authoritarian countries like India or Myanmar or anywhere else, it's the government that is the main obstacle to having free speech—not groups of hat-wearing nitwits.
Anyone posting something outright illegal on a social platform is making themselves a target for law enforcement anyway — why subject the entire platform to censorship on their behalf?
Anyone posting something outright illegal on a social platform is making themselves a target for law enforcement anyway — why subject the entire platform to censorship on their behalf?