Sure; I think you may have read my comment wrong, I'm talking about people who, for example, think they're channelling the Archangel Gabriel or that they can materialize objects into existence, or make other totally unfounded claims.

The point I was making was that those people do a disservice to open discussion because nobody wants to be painted with that brush, so it ends up becoming an HN-type situation where, as you rightly pointed out, there is a resistance to new ideas. There's probably a formal-discourse type term for it.