Even scarier that many of them find their way into public "service," educational institutions, and politics. When I taught Earth Science and intro. level geology at a university, I constantly encountered students who honestly believed that the scientific method was somehow flawed. Several students took it upon themselves to try to "enlighten" me by trying to share woo books or philosophies with me. Even more distressing is when I encounter a colleague who steadfastly refuses to acknowledge that there's simply nothing scientific about making untestable claims. So, I go fishing a lot and try not to worry about it too much.