I found this quote on a forum.
"Just because some jackass asserts a thing does not mean that it is worthy of refutation. If the same guy tells you that every space shuttle launch perturbs the Earth's orbit, and that the cumulative effects are just about to start the process of the loss of the atmosphere into space, thus creating a vacuum that will destroy all life on the planet in approximately 36 hours, would you deem this necessary to refute? How much time would you spend explaining to him why this cannot happen? Would not your time be spent better doing other things? And if you devise a concise explanation, why would you assume he would understand?"
This is the reason why I don't bother to debate the likes of certain folks. This person sums it up well.