I was once Agnostic, in that I believed I didn't know and in times of stress I did clap my hands together and prayed to something I didn't really believe was there, in the hope of willing some extra luck out of the cold indifference of the universe.
Since reading The God Delusion I have gone from being an Apathetic Agnostic to a Venomous Rationalist and Atheistic Humanist.
Too many people close their eyes to the dangers of ideological beliefs that base themselves on nothing more than wishful thinking.
Never again shall I be unsure of Gods non-existence; and I shall stand and fight for reason and rationality from now until my dying day. – Thank You.