Go back and listen to everything the dad says. Pay close attention to what has happened.
She has pulled this sort of thing before, and was grounded for it. Therefore, the father has tried to deal with this peacefully, to no effect.
She used the Facebook privacy settings to hide the comment from her parents - She knew it was going to cause trouble.
He had spent a fair bit of time the previous day updating her software, using his own money.
I have seen worse behaviour from my niece recently, so I think you are underestimating how temperamental some teenagers can be. (she's since pulled her head in, and I'm sure the girl in this case has pulled her head in too)
Wow Zuri, with that I would have expected you to have a very different answer. I helped my mum out with the bills with my earnings also, but I didnt leave home as early as you did. I'm nearly 24 and I have a 6 year old. If she pulled the same crap that this guy's daughter did, She would be grounded, and her lappy would be up on Trademe (not shot at).
Keep in mind, this guy isn't controlling his daughter, he is punishing her for shaming him. And instead of physically punishing her, he's simply taking away one of her luxuries.