This is actually a question I'm considering now. I'm an atheist, my wife a Christian, and we live in a (legally secular, but in practical terms) Muslim country. In future, when I am asked by my daughter why mummy doesn't have to cover her hair but her teachers do, just how much of a dick is it going to be acceptable for me to be?
'Should I cover my hair, because all my classmates do'?
'Aina says mummy is going to hell because she eats pork, is she really'?
It's also tricky in that if she tells her classmates they're wrong, she'll probably get into a lot of trouble.
I did think I might go for the Dawkins 5000 gods answer, but not sure.