"Mary Cheney" gets over 301,000 google hits with 514 news hits.
Mary wants to impose her values on me, so why should I be denied the right to voice my concern?
And you say abortion is truly a public concern? Well, you are right. But if I take your argument, then how does someone else's abortion affect me? I'm a man,and can't have an abortion. Feminists tell me that since this is so, I can't have an opinion on abortion. Do you agree?
It affects you because it is human. If you undermine what humanity is, laws made by humans have no basis at all, and the reason for our entire government collapses.
Cheney's kid: Alive.
Aborted kid: Dead.
This really isn't complicated. You shouldn't have to ask.
And just because the media chooses to make a circus out of poor Mary Cheney doesn't mean it's 'public' behavior any more then it would be if the media started reporting on the sexual habits of the VP.