I wouldn't class my parenting as Victorian, but this (or similar) always seems to be uttered by the parent of the child who is running amok and causing mayhem. Have you ever found yourself looking at the mother/father and thinking 'are you going to tell him to stop that/put the weapon down/keep the noise down?
I don't think I'm a particularly stern parent, I like noise and chatter, which is probably a good thing as I have 4 boys, but this kind of thing P's me off.