[WS:] Nothing stops your from debating these guys on their own terms, Carrol. However, I find it as productive as holding a debate club in a nuttery.
PS. A refusal to debate an opinion on the grounds that the person who expresses it cannot be swayed by arguments is not ad hominem. It is a decision based on a factual claim, which may or may not be true. -- Wojtek
"An anarchist is a neoliberal without money."