I think he did the right thing. Now days it is getting out of control on how kids an teenagers treat their parents and loved ones. I remember being that age an my dad telling me respect, honesty, homework, an chores, Thats all i ask. My father was very hard on us and i turned out great. And i get why he did this online for everyone to see, to let them now its not cool what she, did an he does not approve what she said. When she is older and have kids of her own, she will realize that what her father did was a good thing. That he is not trying to to be mean he is trying to teach her respect, Honesty, an to do her chores. I think that was a great way to relate to her online. People say write it down to relate to her. Now days it digital so dont blame it cause the parents were relating poorly to her. Sorry but my father would have done the samething.