"And you're such a crap parent, but I don't tell you that do I?"

That's polite enough!

Anyone telling me I was being "precious" or words to that effect, I would just tell them that if they didn't love their children as much as I love my Liebling and wanted to ensure his happiness and safety, that was their lookout not mine.

Oddly enough, I never got too many comments about my parenting.