Ta-Wan
Correct me if I'm wrong as I've heard this is not possible to disprove the possible existence. I am though convinced this disproof is watertight.
Firstly, while it may be deemed difficult or impossible to disprove of God, it is certainly impossible to prove there is a God. There is simply no experimental way for a person to follow a set of instructions and prove to themselves that there is a God. God can only be "proved" to exist by unsubstantiated claims or references. It can be disproved though by simple reasoning.
Disproof of something that is in itself unprovable is not so much a necessity, so this disproof is only to allow people who believe there is a God to systematically learn otherwise.
Disproof:
A widely claimed feature of God is omnipresence. 'One can not hide from or be absent of God.' Due to this, God must be everything we know and do not know, entirely infinite, beyond any limit one could possibly place. God is then as much the rapist as the AIDS virus, as the cute puppy, as the smell of a flower. God is as much the meal as it is the turd.
Being omnipresent, the totality, all extremes and their balance, results in a bland nothingness. Any statement to move God from this state must then discredit the claim of omnipresence thus:
"God is not bland and nor is God as much the evil as it is the good."
"So then, God can not be omnipresent."
This may well encourage the following response;
"God is beyond your reasoning."
This though moves God to something indefinable and, if indefinable, it is not a thing with any qualities, so is null and void. If God is given qualities, then God is no longer omnipresent and so the so-called 'Proof of God' has broken down into a circular failure.
To escape this, God may have the attribute of omnipresence removed and to then be redefined as Good or some other set of qualities. I am though clear in my resolve that, once God is defined as a set of features but not omnipresence, then the initial infinite nature begins to deflate to the finite. Once this deflation is under way, there is nowhere to go besides annihilation.
A God that is not omnipresent is then smaller than the infinite, subject to external forces and so not 'all great' or worthy of the name God. Such a thing must have come into being and so then must go. A God that is omnipresent is featureless and valueless as it is as much the good as the bad. There is no escaping this argument that I can see.
So then, not only must this disproof be disproved, so also a valid proof of God's existence must be made. I'll bet my life it never will be.
You can check out Ta-Wan's other musings here.