ONE day in early 1970, a cross-country skier got lost along the 46-mile Kekekabic Trail, which winds through the Boundary Waters Canoe Area Wilderness in northern Minnesota. Unable to make his way out, he died of exposure. In response, the Forest Service installed markers along the trail. But when, years later, it became time to replace them, the agency refused, claiming that the 1964 Wilderness Act banned signage in the nation’s wilderness areas.
http://www.nytimes.com/2010/08/27/opinion/27stroll.htm?_r=1