"And if you don't correct it, it's validating the truth of the BS."
Yep.
We let, hell encouraged, the Internet (to) destroy all forms of discourse, information verification, and information processing and that left us with "ignore them" being our only option, but as I keep pointing out "Ignoring them" is not a valid option and if the last four years haven't proven that to everyone's satisfaction I truly don't know what to say.
We have to get intellectual standards back. We have to pull the trolls back from the post-fact world or, and I cannot stress this enough, not only is everything we do pointless, it's actually counter-productive and self-destructive.