Interestingly some of the response to this GREAT VIDEO is indicative of the new American mindset. Post a sign, build a guard rail, put up a fence, establish a rule, hire a cop....etc.
Only those qualified to get you silly civilians out of trouble can make the accurate decisions pertaining to risk.....bollocks.
Oddly- in my 24 years of professional/full time/this is how I make my living, Search and Rescue I have found this ethic most evident in volunteers. I am in no way knocking them mind you...a lot of agencies would not be able to do what they do without those accountants cum burly, experience scarred, weekend rescuers.
So please, pro and volunteer alike- give it a rest. Stop taking yourself so seriously. There are other adults present and believe it or not....they are capable of making their own risk calculations.
....and if you are so jarred by risking your life or going out...change careers or stop being the first volunteer to leap at the call.