No one seems to have picked up on the connection with schools. These are institutions, which young folk are forced to attend and may suit some people, but where people who do not feel that they fit are daily faced with rejection and bullying.

If we are honest, can we honestly say that at some brief moment during our schooldays, we did not plot some nasty 'revenge' on our school, teachers or classmates?

To most of us, the thought of it is as far as it ever goes. But along with sensible measures to ensure that the actual means of destroying people and buildings, it would be surely a good idea to look at the institutions and find ways of reducing the personal resentments that are really the cause of these terrible events.