It is usually people who want to prove to me that I am wrong who start conversations on the subject (for instance, this LJ entry) and it is usually them who can't prove to me that I am wrong. I am irrational - I know this. I cannot prove that God exists, and thus a belief that he does is deeply illogical. But your beliefs are equally illogical, and because neither of us will ever convince the other that he is right (this being the nature of belief) this conversation is absolutely pointless. It will be the next time you have it with a theist, and the time after that, and the time after that. Just what are you trying to achieve by picking fights that you have no chance of winning?

Oh, and re:the icon - citation needed. :)