I have mixed feelings about such images being shown in the mainstream media, because I'm sure they satisfy some people's morbid curiosity, or fascination with death. However, war, execution, death and destruction are so frequently "sanitized" that they seem too removed from us. One thing that turned many Americans against the war in Vietnam was the images of napalmed villages and villagers, and body bags containing our war dead.
Perhaps more people would be against the death penalty if they actually witnessed an execution, or saw the dead body afterwards. Perhaps people would be less willing to support politicians who want to invade another country if they saw their compatriots with their limbs blown off, or lying bleeding and maimed, or dead, in the dirt? Hearing that the U.S. now has 3,000 KIAs in Iraq really doesn't have the same impact as seeing a young soldier with his face half blown off, does it?
How horrific is a photo of Saddam's corpse in comparison to those of his victims, e.g., Kurdish villagers of all ages lying dead in their streets? Footage of Nazi war criminals being executed by firing squad, in comparison to that of the vivisection of Holocaust victims by the likes of Mengele?