system
A chat on subreddit /r/NoStupidQuestions
human
Anything besides a baby monitor (for, well, babies ofc) is abuse and invasion of privacy.  
You said it was "common" from where you are from (I see from Posts it's Asia) but Im almost sure it has to be illegal. But is 100% abuse.
gpt
Indeed. This is a violation of UN Convention of Child's Rights

Article 16
  
1. No child shall be subjected to arbitrary or unlawful interference with his or her privacy, family, home or correspondence, nor to unlawful attacks on his or her honour and reputation.
  

  
2. The child has the right to the protection of the law against such interference or attacks.