This is why Geocaching.com (Groundspeak) has legal statements on their site :

http://www.geocaching.com/about/termsofuse.aspx

See this one :

"Geocaching, hiking, backpacking, and other outdoor activities involve risk to both persons and property. There are many variables including, but not limited to, weather, fitness level, terrain features and outdoor experience, that must be considered prior to seeking or placing a cache. Be prepared for Your journey and be sure to check the current weather and conditions before heading outdoors. Always exercise common sense and caution. You assume all risks arising in connection with seeking a cache or any other related activity."

I have some risky cache locations, that I am rather proud of and in the published listings for the caches, I put an additional warning in.

People need to be responsible for their own actions and choices on whether or not they choose to seek a cache. It is as simple as that.