The essence of Poe's Law is that it's very difficult to tell the sincere fundamentalist from the person making fun of him. You can probably push things pretty far before people go from thinking you're some kind of Christian prodigy to becoming suspicious that you might be mocking them. Given your situation, you don't want the latter. But having them think you're 101% devoted could lead to some interesting and funny experiences.
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould
