Seeing the truth of the threat the Dark Wraiths turned out to be, and the fields of bodies and ruins haunted by countless Ghosts of the past, I can only conclude.. These three committed an atrocity for what they considered to be the greater good, yet their justification seems to ring hollow.

The terror the Darkwraiths can bring seems limited, and simply giving in to the Dark does not make one a monster. Kirk, for example, was a notorious and vicious Darkwraith who turned his talents to serving an innocent soul in trying to heal her sickness..

If anything, their actions may have made the Darkwraiths in to the monsters they so feared..

But, that is just my theory...