&gt; It&#x27;s the difference between &quot;expected&quot; and &quot;unexpected&quot;<p>No it&#x27;s not - people die from unexpected accidents completely unaware of the risks all the time - intuitive risk perception doesn&#x27;t work really well - caveman instincts and all that - risk perception is not the problem - if this was indeed an isolated incident that would not repeat it would be sad but not very relevant - an example of this is Breivik murders.<p>But obviously this is not comparable - people behind this will try to repeat it if not dealt with - this is why it&#x27;s a big deal.