"Rule of thumb: If they are your kids, you can teach whatever you see fit. If they not, butt out."

Quite. We live in a world in which many children are taught to be sexist, mysogynistic, racist, dishonest, homophobic and other such lovely things. They are being taught all that by parents who are teaching "whatever they see fit." Grand. I spent 25 years teaching in inner city schools trying (apart from teaching science) to contest those positions. It's a bloody good job that I and thousands of other right-minded people didn't, and don't, "butt out". You clearly have no idea what you're talking about, have you? Are you about seventeen?