IDK Have you looked? The chance of dying is very low but it could easily make the difference in walking away unscathed and getting a serious burn or cut on your feet. It's no big deal to put shoes on instead of flip flops so why not? My father in law was in the Air Force long enough to be a Lt. Col. so I am sure from experience and his training he saw the reasoning for it. It's all about doing easy little things in life that keep a should be a minor situation from turning into a bigger problem.