How does an agnostic play into it. Most agnostics are agnostic because they don't care if there is a god or not. The rest are confused or just believe in some sort of intelligent design and the result won't affect how their live their lives at all.
It is a one choice decision. Look at "Do I have brown hair". Some would say yes, some would say no, and some wouldn't care or not have a view on the subject. The fact that people don't care or don't have a view doesn't change the fact I either have brown hair or I don't. God either exists or he doesn't.
Yes proof can work both ways, but like I said before it should be up to the believer to prove or justify what they believe in, and since nobody on earth can prove that there is a god, it's not such a wrong thing to say it's proof it doesn't exist.
