I’m not saying that we, as parents, should always use our kids to do our dirty work. I’m saying that it would be pleasing to see a four-year-old walk through the grocery store or past a crowded restaurant and stop to point and loudly proclaim, “Mommy, why isn’t that person wearing a mask?”
source https://offspring.lifehacker.com/train-your-kid-to-shame-adults-who-dont-wear-masks-1845520369