While I agree that this represents the still barbaric behavior to be found in many Muslim dominated countries, it seems to me that woman would have taken the time to learn something about the customs and sensibilities of the people before going there to help them.
I pretty much thought everyone these days knew that Muslims are traditionally conservative to the extreme and have very strong views on public decency.
I also can't imagine why anyone would be surprised that these people would stone someone for an offense. They've been doing it for centuries. I guess Bono and the woman both got a nice dose of reality. The world isn't the warm and fuzzy place some people create in their heads.