Here is an interesting blog post on park rangers vs. poachers in our National Parks.
Featured in the video at this site is Cody Murphy. At the time he was the South District Ranger at Shenandoah National Park. This area adjoins the Ridge District of the Blue Ridge Parkway where I worked as the District Ranger for 23 years. The resource poaching problems that Cody describes are present in all the National Parks within the Southern Appalachians.