That is actually what I have heard the rangers tell people who ask that question. A few years ago on one of my rim-rim-rim escapades we encountered a small group of non-English speaking tourists with little to no gear at the Indian Garden. We couldn't communicate with them, but they had no water and no lights (it was just after sundown).

I always try to let people know (usually visitors to here in hell) that they need to have water with them even on a "short" hike in the AZ summer. Have had a few people get pissy and I simply explain that when they inevitably call 911 that a bunch of firefighters will be out here hiking in to carry you out. Heck, I was even told by one jerk word to the effect if ?that is you job, if you don?t like get another one?

Most people appreciate the advice; others are just are bound and determine to kill themselves and their families despite everyone?s best efforts and intentions. Like Forest?s mama used to say ?Stupid is as Stupid does?