Lack of evidence doesn't prove there is no God only that you're not convinced one exists.
Likewise, lack of evidence doesn't prove there are no other living beings on other planets but because there is lack of evidence you're not convinced. Example, if I said I can fly in my apartment telling me I lack evidence doesn't prove me wrong. You're just not convinced.
The best way to prove there is no God is to challange and invalidate the evidence presented not say there is no evidence as if the counterclaim alone defeats the original claim. Example, you can prove I can't fly by the laws of physics.
We should stop answering the question that asks for proof there is a God by saying for lack of evidence. The theist presented the claim and their evidence but you're just not convinced.
No, this isn't an open field to attack an uncommon opinion of an atheist. Food for thought.