Sounds like you don't have any kids... What is your suggestion? To sit in the room monitoring all usage while the teenager is using their device? That sounds like a non-starter... Or not letting them have a device in their possession at all? The phones are how kids communicate, both for classwork as well as socially. And what would you be teaching them to just take it away anyway? Kids need to learn how to use a phone
responsibly. And let me tell you, it is no easy task getting all the parental controls set up properly in order to give kids some freedom, but curtail some of the abuses. The comment from
@East_Bay_Mac was right on target.