The children can complain about their situation. The parents should not complain about the children's situation because the parents actively chose to put their children in that situation.
The rules are bad. The children are in a bad situation. The parents don't get to pretend they didn't contribute to that situation.
Why not? Why can’t people complain about unjust laws they could have avoided? Why is it so important to control who gets to complain that you give that question more attention than the problem of innocent children being victimized by bad laws?
The children are being victimized by their parents' bad decisions to break existing law, not by the law itself. Whatever happened to the idea of personal responsibility and the accountability of parents to make good decisions for their children?
The rules are bad. The children are in a bad situation. The parents don't get to pretend they didn't contribute to that situation.