Is it wrong to monitor your childs text messages?

At first I thought this was an adbot, because of how the post was worded.

Intense invasion of privacy.
Unless there is a reason of suspicion, no.

Who smells future court case?

You're still a minor under their care. They can open and read mail that was sent to you until 18 if they wanted to, and there's nothing you could do about it.

Edit - My words got misplaced and messed the sentence up.