All it proves is that images of death, destruction, strife, disaster is what mostly get selected.
Unfortunately, Fahim, a miracle of a child enabled to walk, a city getting it's first modern hospital or a women's collective in Bangladesh making enough money to change their children's future are not as newsworthy.
To illustrate the human condition, why do we need more than one example of the horrific consequences of hatred or avarice?
Can't the best pictures I include at least one happy family? Hey, I'd take a panda and it's cub, I'm not hard to impress!
Showing the knife at a prisoner's throat adds what? To me the actual display of this is unjustified and pandering to the lowest values. As evidence for a trial, it's not even of probitive value as there are no identifyable faces of the perpatrators. In fact, I'd wager that with pictures being taken, more throats were cut that day!
Asher