Some people have been throwing a shit fit over the simple fact that he used a gun. He was calm. He was cool. He was collected. It was obvious that he was frustrated, but this wasn't really done out of spite. It was a lesson, plain and simple.
I grew up with a father who would have done the same thing. There is no requirement in life that a teenager needs a cellphone, a laptop, an MP3 player, anything. Clothes are their back, food in their bellies, and a roof over their head. That's all you're legally required to give.
This girl decided she deserved more. For doing things MOST parents require their kids to do and follow. She's fifteen, going on sixteen. Time to learn some responsibility.