I've been meaning to write this up for a while, but once you see this it just becomes blindingly obvious. They lack a sense of reciprocity in argument rules.

That's certainly true. but consider this as part of a larger social group competitive landscape. you're not talking about individuals, but groups of self-reinforcing believers.

I think most people don't really want reciprocity in argument rules. I'm not sure this is a particular indicator of conspiracy nuts.