It was right!
I have a pretty good stink eye for kids when they’re being obnoxious — even as young as ones sitting in grocery carts. I try to do it when the parents aren’t looking, and the screaming stops on a dime, literally mid-scream. They know what they’re doing is wrong.
My stink eye is based upon: “They have to believe you can and will kill them.”
Line from some TV show or movie from years ago. Works well for me.