Seriously? Only warnings posted should be for Gila monsters, rattle snakes and possible falling rocks in applicable areas.     

Five Federal Lands in Arizona Have Travel Warnings in Place

"....That scenario is playing out as reality in southern Arizona, where parts of five federal lands -- including two designated national monuments -- continue to post travel warnings or be outright closed to Americans who own the land because of the dangers of "human and drug trafficking" along the Mexican border. ...."

http://www.foxnews.com/us/2010/06/18/federal-lands-arizona-travel-warnings-place.html