How do you know you spot the hallucinations, and that you're not just catching the less-good ones while accepting convincing half-truths? It may be that your subject is just that clear-cut, and you've been careful — but what I worry about is that people won't be, and will just accept the pretty-much correct details that don't really matter that much, until they accrete into a mass of false knowledge, like the authoritative errors quoted in Isadore of Seville's Encyclopedia and similar medieval works.