Good question Myers. I just asked my son. First he said he wouldn't care and then he said he would just figure out a way to disarm it if he wanted to hide where he was. I said that would cost him access to the phone and he said he wouldn't care because he'd rather show me that I can't get away with spying on him. When I asked about it being useful for safety reasons he just laughed because he is 6 feet tall and 200 plus pounds and of course thinks he is amune to trouble. He thinks most teens wouldn't like it because they do things they don't want their parents to know about. He thinks they would figure out a way to outwit their parents anyways so its kind of silly.