One of my favorite stories is of an old friend. He was Russian Jewish, and his wife Phillipine christian. They forced nothing on their daughter, but told her, "This is what we grew up with, accept either or make your own decision". Unfortunately this is certainly out of the norm. I beleive that what perpetuates the indoctrination on children is that parents are convinced that they are doing a good thing. Basically the parents are brainwashed into believing that one can't be good without god, so we can't expect them to instil secular "goodness" upon their offspring. After all, they don't want them to "grow up bad".
I find forcing religion on children scary at best, but I see no easy way to curb it.