I read this, and I have no problem with clinton's decision or her flip-flop on the issue, she can do what she wants. However, I do wonder if it matters who the biological parents are for a passport application. Everyone has a Mother and Father, regardless of who's paying the bills, taking care of them, or building a lasting relationship with them.
In the case of divorced and remarried parents, you would list your biological Mother and Father as parents rather than one biological and one "step," right?
You would certainly want any official docs/medical records to match your passport, I'm guessing, particularly in the event you lose you need to proved who you are to a consulate overseas. Or maybe it doesn't matter.
In any case, this is what came to mind as I was asking myself, "does it matter?"