I think it depends on the situation. If someobody's kid is known for getting into trouble and doing things that they shouldn't be doing, then I think it's justified. But, if the kid was honest, had a good relationship with his/her parents and rarely/never got into trouble then I don't think it's justified. Hopefully that made sense.

Basically, if the parents have a valid reason to do things like that then I'm fine with that. If they don't have a valid reason, I disagree with it.