It's one thing to have monitoring that your kid knows about, but monitoring your kid doesn't know about is child abuse. 16 year olds are people too, and this is no different from installing spyware on your partner's phone because you suspect them of cheating.
Come back to me when your kid (at 13) gets addicted to video games, and starts setting an alarm to wake and play at 2am behind your back, and getting no sleep.
Their brains aren’t developed. You don’t let a 3 year old pick their own meals.
