Ack!
For the moment, put aside physical or sexual abuse. Children know when they are being abused. They are afraid sometimes to tell, but they know they are being abused. Children who are abused often come forward, many are discovered. This is a horrible crime, and thankfully it is rare and most cases are discovered.
What other behaviors should parents be monitored for? For how many other things will children be directed to monitor their parents for the government? What precedents will this set?