Where was the first "adult" conversation mentioned? All I heard was that she had done something similar in the past and been grounded for it.

The whole thing just seems destined to a no win situation with all parents against all children about who is being less respectful to who, and I simply don't see how parents like him are going to come out on top as being more "adult" about such situations and as supposedly setting the example by also airing their dirty laundry for all to throw their two-cents in on. Some parents can be ignorant too, and just as likely to deny that they're being ignorant.