Reminds me of the t.v. show "Super Nanny". People don't understand that their kids have a greater intelligence than they do. Its because they have not yet been dumbed down through the education system. So the kids will learned very quickly on that throwing tantrum is a way of controlling the parent... to get what they want. They really have learned it from the parent. And the parent is unconscious to the fact.
Now bringing in a cop into you home... you just invited the 'Nanny' State to come in to discipline your child and very possibly to take your kid away from you.