A couple of weeks ago, I was having dinner with some friends before a concert and we got to talking about growing up religious and about not being religious today. It was a long conversation about all the reasons why none of us were religious (one of my favorite topics, but it is better if some present are still kind-of religious).
Anyway, at the end of it we got to talking about parent and one guy said that if he became a parent, he would have to raise his kids religious.
Our mouths dropped open; all of us wondering just how he had come to that conclusion. Finally I spoke up and asked. He said that he couldn't imagine keeping his kids in line without the threat of a God.
This represents one more fallacy in parenting without religion. What people have to understand is that children (young children) think of their parents as Gods. They don't need some other God to threaten them and in fact don't really understand that. Many psychologists think that our tendency to believe in higher beings comes from this period in our life when we see our parents as Gods - we want that continue; we want someone to be looking out for us, protecting us, and loving us.
Kids want so badly to please their parents, that you don't need any threats from some higher being to keep them in line - you are that higher being.