Who is Negligent Visitors from Death in Yellowstone: Accidents and Foolhardiness in the First National Park and what is their importance?

If Death in Yellowstone can be said to have an antagonist or villain, it is negligent visitors. This may seem odd at first, as the visitors are usually the victims of some horrible happening in the park. Children die in hot springs, friends are swept away by river rapids, and some die in pointless gun fights. That said, most of these deaths, in Whittlesey's view, are the fault either of those who die themselves or the fault of their friends, family or parents.