‘Karens’ like Miya Ponsetto should be NYC’s last worry amid rising crime

The day after Christmas, in the lobby of a tony lower Manhattan hotel, a 22-year-old woman misplaced her cellphone. Somewhat intemperately, she accused a 14-year-old boy standing nearby of having stolen it. The boy’s father, noted jazz musician Keyon Harrold, filmed Miya Ponsetto as she had a meltdown — she screamed and yelled and chased…