A few things:
1) Burden of proof lies on the person making a claim. What claim that may be is irrelevant. It could be that God exists. It could be that God doesn't exist. It all depends who's making the assertion and who's countering it. Whoever's countering it does not have burden of proof.
2) God, other forms of deities, the supernatural, etc all lie outside of the empirical, meaning asking for empirical evidence is pretty damn stupid.
3) We live in an empirical world. You can't ask for anything other than empirical evidence, at least as far as others can provide.
4) Also as a consequence of living in an empirical world, anything outside the empirical cannot affect it. Therefore its existence or non-existence has zero effect on the world we live in.
My conclusion: Whatever is, is. Whatever isn't, isn't. I'm gonna eat drink and be merry in the one live I know I have, rather than worrying about things do not currently affect me or have knowledge that they will effect me in the future. That doesn't mean I don't make proof-less assumptions; I make the assumption every day that I'm living in a real world and not some Matrix-esque fantasy. However, I choose not to make an assumption on this particular topic, nor look down on those who do choose to make an assumption on it. I only look down on those who force their assumptions down other's throats.