I've done things in the name of discipline that I am sure others think is horrible.
None of that seemed horrible to me. Then again, I regularly ate leftovers for breakfast, before I had teen-aged sons.
I don't think this is a situation that requires child protective services. I think parents should have a lot of leeway when it comes to how they discipline their kids. They are, after all, the ones who are ultimately responsible for their children's actions. I find it a little hard to swallow that you can be held accountable for your children's actions, yet you are not allowed to guide/punish them as you see fit to encourage them to act in a way you find acceptable.
If evey parent disciplined their child in a rational fashion, carefully weighting the combined measures of communication, punishment, and the child's own personality, I would agree with you. However, too many parents discipline in ways that are destructive and coutner-productive, causing their kids to act out even more.