Not really. The uninformed and at risk hiker doesn't go looking for that kind of information. You can have signs, handouts, comprehensive accident reports, stories on the 6 O'clock news. All will be ignored.
Nobody believes something like this will happen to them until it does. Don't climb on the wet rocks next to a waterfall. So, what do they do? Don't try to climb a mountain in shorts, sneakers and a t-shirt. So, what do they do? The list is endless.