I feel sorry for people like that. They are genuinely ill.
Don't you feel sorry for Cassandra? And in general, before the Yellowstone eruption, I don't even want to hear about this nonsense. And let Shiveluch erupt as much as it wants; the fact that it's on the opposite side of the same plate is irrelevant. It doesn't matter.
And besides, what difference does it make? We won't be able to reach the shelters anyway. So, what's the point of rushing around then? You're right. Such people bury themselves beforehand, but you still have to live until that "before." And we all have to live too... but we want to!