For your info, the President isn't 'hiding' from Cindy Sheehan. He met with her and her family last year, and from her own account of the meeting, she was pleased that he took the time, and she said THEN that she understood his desire to bring democracy to the people of Iraq. It's only since becoming allied with Moveon.org and Michael Moore, and the usual anti-war suspects that she has taken her current stance.
The President doesn't owe this woman anything. Her son decided to VOLUNTEER for the military, and though she may not have liked it, it was his decision.