I don't know if you all have heard of Chris Jordan before. He does some interesting very large scale art work featuring garbage or consumable goods to illustrate the vast quantities of some of these things that we all consume.
One of his latest pieces is a rather powerful political statement about the Bush administration's abuses of power and human rights, called "We the People"
It is an image of a piece of the US constitution made out of pictures of abused and illegally detained people, abused and detained by the US. The image "depicts 83,000 Abu Ghraib prisoner photographs, equal to the number of people who have been arrested and held at US-run detention facilities with no trial or other due process of law, during the Bush Administration's war on terror."
Here is a close-up:
If you go to his website, you can see an actual size portion and get a feel for just how large-scale his stuff is.