"I don't think anyone is entitled to tell children lies"

I suspect the first big hurdle to persuade people and families that such things are lies. The second would be to have a gigantic intervention in the family unit.

Russia was officially an atheist state for 70 years after WW1. The government attempted to erase most aspects of religion. They were not successful, as many Russians declare themselves believers today (most tied to the official church, as in England). This shows some big resilience with religion, even with big government and social intervention.

So, if it were up to you, specifically what are your concrete suggestions to ensure that parents don't tell children such religious lies", (your interpretation), who would do it and how, and who and how would it be enforced in any country?

Now I am not say'in it can't be done...I'm just giving some perspective before you give us your strategy on how to do it.