What evidence of no deity could you possibly expect to see? If there were no God, I wouldn't expect there to be any evidence of the fact. In fact, if I were to find the words "There is no God, stop looking" engraved on an atom, my conclusion would not be "There is no God," but rather (ignoring the possibility of hallucination) "There is a God or some entity of similar power, and he's a really terrible liar." Eliezer covers this sort of thing in his sequence entry You're Entitled to Arguments But Not That Particular Proof.
If you really want to make this argument, describe a piece of evidence that you would affirmatively expect to see if there were no God.
Right, I don't see how there could be any evidence to convince a person to the point of a 0.0001 chance of God. And so when all of these people say that they've concluded that the chance of God is negligible, I think that they're subject to a strong cognitive bias worsened by the fact that they're supposed to be immune to those.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.