Ahhh, this old chestnut. It does not take "faith" to believe that something does not exist. There are literally an infinite number of things that you believe do not exist, simply because there is no evidence that they do. For example, if I told you that there is an invisible elephant in the boot of your car right now, would you consider yourself on the fence as to whether I was telling the truth? Or would you simply reject the idea as absurd, until shown evidence to the contrary?

Agnosticism is fine, but for people who place the burden of proof on those who make extraordinary claims, atheism is not a faith-based decision.