ignorance is often fatal. Don't have to be a tourist to prove this. Don't have to be in exceptionally strenous circumstances to prove this either. The ignorance of the todler walking in traffic can be fatal - The toddler is considered juvenille and so others are blamed by the death ensuing the ignorance. The ignorance of the cyclist not wearing his helmet may be fatal. The cyclist is considered adult and so we don't blame others for his death as he attempts to put his head through a telephone pole at > 60 miles an hour. I don't think that it helps to try to make others responsable for the ignorance of an adult. If the information is available and the supplies are available then the reasonably wise adult will take responsability and care for themselves. The less wise will not. If the gov't puts more regulations on what business must or mustn't do to prevent the ignorant from killing themselves it only makes life harder on businesses. It does little or nothing to keep the ignorant alive. Let's presuppose that the Govt requires the rental agent to provide a written list of instructions and a stern speach before the ignorant adult is allowed to drive off in the rental car. Is that ignorant individual who was not wise enough to have researched this information for themselves any more likely to listen to the stern speach or to read the list of instructions. Are they any more likely to take out and read those instructions then they were to pickup one of the water bottles and carry it with them as they walk out into the desert? The flaw is thinking that you can impart wisdom to the unwise. You can instruct, cajole, supply and unwise individual but they will remain unwise and ignorant and those are the fatal characteristics. Meanwhile as you make these annoying behaviors legal mandates you make the lives of everyone else more difficult and annoying. You do actually generate more jobs for bearuocrats and enforcement officers so it may be good for someone.