I occasionally read the Bible. Never all at once, just interesting pieces with which to frighten door-to-door evangelists. I love finding little pieces with which to end a conversation, and put the believer completely on the defensive -- "Seriously, you believe in stoning rape victims? For being raped? Jesus says you have to..."
I've got a brand new one, though, to end conversations about the importance of religion, or the definition of religion. I'm talking, of course, about Scientology.
Well, that or the Flying Spaghetti Monster, or the Invisible Pink Unicorn, but reductio ad absurdum works so much better when you can actually point to said absurdity in the real world. There is actually a large and vocal group out there which believes an evil emperor named Xenu sent aliens called Thetans to earth on DC-8s (which fly through space), and then nuked them in volcanoes.
Note to religious people: Yes, I do think it's stupid of you to believe in religion. Understand two things:
First, it doesn't mean I think you're stupid. Smart people do stupid things.
Second, I won't attack you for it. I'm a bit trigger-happy with my atheism, but still, if you don't bring it up, I won't. It's a bit like homosexuality -- I really don't care what you do in bed (or elsewhere), or who you do it with. It only becomes a problem if you start hitting on me -- or evangelizing to me.