I don't know if scanning the ETS threads would give you the proper perspective on something like this. I live in the Rocky Mountain west. I frequently read about hikers who have gone missing and are later presumed or found dead. Many of them have one thing in common: they are described as "experienced hikers." The articles don't say whether or not they were "real ultralighters". I suspect that more than a few of the dead guys thought they were. I guess maybe they were wrong--or maybe they were carrying razor blades instead of knives, or figured they didn't need a map or water.