It has been pretty well known that quite a majority of Whitney hikers don't even know about the Whitney Forums. I believe that the more people learn, the better prepared they will be.
I do not think that this was a factor in any of the three cases that George mentioned, as quoted below:
In each case, these individuals rescued or searched for were warned by experienced individuals to "Turn Around -- it's just going to get worse!!" They didn't and a major SAR (and one death) were the result.[
They were adequately warned. Most of them were experienced. They
chose to ignore thee most pertinant information available: the deteriorating weather.
I believe that all the information and hand-holding in the world will not do the trick with this special breed of folk, rather, in this case, only the stick will do.