I don’t buy the “you can’t trust people with it.” What does bother me is the addiction angle. And that’s all cell phones, not just smartphones. Walk down the street in a frum neighborhood on a day that isn’t Shabbos. You’ll see the majority of adults walking with head down, phone jammed to ear, oblivious to the world and other people. Or the adult at home taking care of children that he/she is only half aware of, because of the phone, again jammed to ear. Or the spouse who feels cut off. Or the driver who just almost ran you over at the corner. Fortunately teachers aren’t allowed to use their cells during class, otherwise we’d have neglected students, too.
As the not-so-old Lipa music video says, “Hang up the phone!”