I agree with the spanking... although I was rarely spanked because as soon as there was the threat of spanking I would cry and apologize!! I saw my big brother get spanked enough to know it wasn't something I wanted. And we're both grown up now and are nice people with educations and good jobs and no anger towards our parents
A few of my younger cousins were just like the little girl in the example. They would go NUTS and actually went so far as to start fires in their house and ruin furniture (sawed a table in half!) and were completely uncontrollable. If my uncle stepped up and tried to spank them, they would actually get on the phone and call social services to say they were being abused
And from then on, they only had to threaten it and my uncle would back down. The oldest got pregnant at 17, her next younger brother went to jail at 14, and the youngest got taken into foster care until he was 16, and then he chose to move back in with his dad. He now does whatever he wants, and is pretty heavy into drugs
It's made a big enough impact on me to know that when I have children, they will be disciplined from day 1.