Questions for both sides.

[Darkstar]

Atheists: I have three questions.
1. Is there an organized group of atheists that has a global presence?

Not that I know of.

2. For what reason do you go about and try to disprove the beliefs of the theists?

Go about where? Outside these forums I'm in the closet about it. Not every atheist is interested in disproving religion, but I do like a good debate.

3. Isn't the belief/knowledge that there is without a doubt no God/gods also faith based? ( I don't just mean the Christian God, but the existence of higher beings in general, and please don't bring up the stupid flying spaghetti monster argument).

Maybe...but only technically. An infinitesimally small amount, if any. And not blind faith. First, there is a difference between not doubting something and having absolute knowledge of it. Second, by the same logic that this would require faith, so to would assuming that the world wasn't going to be eaten by a giant alien tomorrow require faith. So, not really. Courts require reasonable doubt to let the accused go free. I don't think it is reasonable to think there is a possibility of god existing, and it only cannot be proven because it is typically impossible to prove a negative (unless you can prove a mutually exclusive scenario).