I have a member of my congregation who is very inclined to believe some unhealthy conspiracy theories. Bigoted or verging on the bigoted. It's the sort of thing I have seen in more fundamentalist religions quite often, and I have always been glad that ours doesn't seem to attract this sort of thing. It would be a more minor issue if this same member didn't constantly insist on being the first person to welcome new people or speak publicly on behalf of our Fellowship. Attempt to address this from a factual point of view is met with a seemingly inexhaustable stream of misinformation. Any thoughts on how to address this?