I think if you are going to continue having your children present in these types of institutions, you should arm them with the correct knowledge so they can
Indeed, and this is the problem, in relation to religious beliefs there is no correct knowledge. In my own opinion christians are deluded. I don't tell my kids this though as it's far too complicated at their ages to fully understand what I mean and why.
I'd prefer my children to form their own opinions based on evidence they have learned to acquire, and that their opinions be changeable and not an absolute belief.
But as we know this takes time, and as I allow them time to learn to acquire information and knowledge to make an informed opinion, someone else is using this "gap" or window of opportunity to subtly indoctrinate my childen into their own way of thinking.
Many xtians screamed from the pulpits at the alleged subliminal messages with Disney movies, but these same screamers are trying to do much the same thing to my children.