Unfortunately any argument of that form can be rejected immediately on epistemological grounds. Take for instance the argument “we can’t say certain words any more because speaking them will summon an ogre who will immediately kill and eat the speaker…and I can’t give any evidence of this occurring, or give an example of any of these words for obvious reasons.”
There's something to be said for priors here. I personally know three (yeah, I hang out w/a fun crowd) people who have lost their jobs over social media heresy. I don't know (and have never heard of) anyone getting eaten by an ogre.
So yes, I am inclined to believe that modern heresy is a phenomenon, and I am not inclined to believe in ogres.
