What do you do if your teenager ignores the rules about curfew, sexting, or talking on the phone? You could, I guess, take away their phone privileges.
If you can’t control it, ban it.
“Banks Weigh Barring Chats,” Wall Street Journal, November 11, 2013 C1 http://on.wsj.com/1eFqK1S Various banks consider prohibiting traders from using computer chat rooms. And perhaps others technologies as well. It took a number of well-publicized scandals and billions of dollars in fines.