The young father was at the end of his rope. “Ice cream! Ice cream!” his toddler screamed. The meltdown in the middle of the crowded mall began drawing the attention of shoppers nearby. “Fine, but we just need to do something for mommy first, okay?” the father said. “Nooooo! Ice cream!” And then she approached them: a small, well-dressed woman with shoes that matched her handbag. “He’s having a big fit,” the father said...