I really don't feel/think that there is much of a need to even debate these kooks.
But there are people who WANT to believe these kinds of things, and one needs to have something evident and concrete, and not just shrug it off. I found some good stuff too to refute the case...item by item.
It makes them maddest when I tell the nutjobs that I don't respect them enough to listen to or debate their psychotic fantasies.