The human shields are not in Iraq because they are smarter than some people give them credit for. If they went to Iraq they would likely get their asses blown away, and they know that. While it's true that coilition forces would not kill them were they using their bodies to shield innocent civilians, they know the terrorists would blow them and the innocent civilians to kingdom come without batting an eye.
Glad you did the follow-up. Confirms what I thought originally.