From that site:
"The reaction to the picture was so strong that The New York Times published an unusual editor's note on the fate of the girl. Mr Carter said she resumed her trek to the feeding centre. He chased away the vulture."
What a sad, sad picture. It has its own validity, in spreading awareness about the seriousness of the situation in Sudan, but I really don't think it has any humourous value.

That's right up there with making WTC/9-11 jokes.