Creation scientists actually do go pretty far, though, in trying to make things as physically plausible as they can. I think they're aiming for a theory where God makes specific events happen, like creation itself, or unleashing water in the ground and air to generate the Flood, but aside from that physics pretty much runs as designed. And to their credit, this would be sort of a local minimum in divine interference required for the theory... if the rest of the physics worked.

Ed: though I suppose that implies less than it ideally would about the attitudes of random believers on the street, who might well be a lot less principled about where they let divine interference into their model...