Well, I think the fact that there haven't been any major accidents is due to the fact that people are generally able to take care of themselves.  These are stairs, there is no requirement that one must go all the way to the top.  I would like the stairs to remain even though my stair climbing days are over.  This is a far safer hike than many other trails on Oahu.  And it is not that long of a hike.  It is not like hiking on Kauai's 10 mile hike.  Now that is dangerous.