This one annoys me when I see it, because we can do experiments to demonstrate it. Antibiotic-resistant bacteria are a prime example.
While we're on the topic of crazy religious arguments, there's this one: "We know God is perfect. If he didn't exist then he wouldn't be perfect, because not existing is a flaw. Therefore God exists."
So basically the argument that 'proves' God's existence requires that God exist. Also: proving God's existence kinda counteracts the idea of faith.
Another thing: The whole "God can't lie" thing is kinda weird. How do we know that he can't lie? Because God told us that? Couldn't he have been lying about not being able to lie? Couldn't he have been lying about everything? Maybe God is just a major asshole who's dicking around with us.