I don't understand why anyone would punk you here, because you are mostly always congenial and have intelligent point of views, and you seem like you respect others.
So, we know who the real troublemakers are here. It's certainly not you!
And Fake News is not always easy enough to Fact-Check, so how do you prevent it? Not any way to prevent it.
But Blatant racism is something that should not go unchecked! There should be a rule against using racism in the forum. And there should be a first warning, and if it happens again, they should be suspended, and if it happens 3 times- 3 times you're out!