God cannot, however, be DISproven. It's an unfalsifiable hypothesis.
Well, up to a point. Many theologies try to make claims that amount to predictions: God will answer your prayers etc. So far, none of these have passed the test, thus demonstrating that whether God is real or not, the theologies that try to make us believe that he is, are not true.
Oh, so because you didn't get the answer that you wanted God no longer exists?
Sorry, doesn't work that way. An "answer to prayer" may be the answer you wanted, or it may not be.
For instance, praying that God make your bank account contain a million dollars out of thing air will probably not make that happen; thus a negative (no) answer. That doesn't mean that God didn't answer your prayer - just that he chose to answer it in the negative instead of the affirmative.
So again, that is not a valid method of DISproving God's existence.
Most people would long have abandoned a concept with such a poor track record. The only reason why some people hold on to this, as far as I can see, is bullying: every time you dare raise the question of why God never answers even the most reasonable prayers, or the most desperate ones, or indeed any prayers at all, you are met with "How dare you test God?!? Who are you to demand any proof of God?!?". Bullying, plain and simple. If God was real and cared about us, he wouldn't be so petty, I'm sure.
Sad when people respond that way; but it goes to show their lack of understanding of what an "answered prayer" means. Too often people expect that an answer is only the answer they are looking for, when the answer may just as well be the opposite.
This is actually demonstrated Biblically as well - when Jesus was in the Garden of Gethsemane (Matthew 26:36-46) where he asked that what needed to be done be taken from him if at all possible. The answer was clearly "no" - he didn't get what he prayed for, but rather submitted himself to that response.