I seem to vaguely recall that, Mr. O'Rights. My theory is that the thread is still young, and the privacy advocates haven't found it yet. Patience
Plus, in those 6 or 7 years the number of reported incidents of child molesters using social sites on the net to find victims has gone up, which I'm sure has shifted some people's attitudes.
My argument hasn't really changed though. If the kid wants privacy, he can sue for emancipation, move out, and get his own damned place. As long as I the hypothetical parent am responsible for him, and Paying, for him. . .His life is open to inspection.