You have problems with people doing their own thing? If these persons were many miles away from any source of help and out of contact with civilization of any sort, I might agree that they should take some other stuff for emergencies.

What I really have a problem with is people I see with no water bottles on their bike or person out in areas that must be twenty or more minutes away from anything on the hot days we have here.

But still, it's their decision. Get over it. Maybe you'll get a opportunity to be a hero and come to their rescue one day.