They have a use and can be abused.
A few years ago, there was a report on one of the network "news" programs, 20-20, 60 Minutes, don't remember which since I don't watch many. Anyway, it was about the Grand Canyon and how many people walk to the bottom only to find that they have to walk back up! DOH!

It wasn't necessarily about GPS but about the "yuppies" as Ichiban stated that are costing the taxpayer money for their own inexperience and stupidity!
I'm an adventurous guy (or was in my yoot!) but I had my limitations and reasoning, common sense and enough backwoods experience to not kill myself. Had I had the money back in the day to heli-ski in some of the back country like they do today, I may not have survived though.
