If God does not exist, it seems to me there are other pieces to the package, too. If God does not exist, there is no justification for morality and morality is simply what people choose to decide at any given point. Next week they can change it. That's part of the package. If God doesn't exist, then obviously there is no accountability to a higher being and we're not accountable to anyone.
Beliefs have to fit in a world view in a coherent way to be defensible.
When one examines particular views, you don't just examine the view itself, you examine how it fits in the larger package. If there is no God, it seems hard to argue for any ultimate meaning in the universe or any ultimate order. Certainly you can't argue for design. If there is no God, then there is no design. Everything is a matter of accident, so if someone believes that there is no God, but then talks about the world and the universe in design language, he is saying something contradictory.