Golden Gate Nanny State?

We arrived at the Golden Gate Bridge just at 9:00 with the view of seeing the sunset while we walked across part of the span.  We saw the bridge and the sunset – both were beautiful -- but not the sunset from the bridge.  The bridge closes to pedestrian traffic at 9:00.  Perhaps this is to prevent night-time suicides from taking the fatal plunge?  If so, it may be justified as a means of protecting the public.  But for us it was unfortunate as it also forecloses many pleasant strolls along that beautiful span in the gathering dusk.