Reducing risk... the thing is, the men driving the drone has no where near the awareness of the men in the field, the casualties will be far bigger.
Considering how little times they have been used compared to the amount of side casualties done i am not sure if they reduce anything at all...
Again, the past 2 wars werent full blown wars at all, as such it is hard to decide if those drones are effective at reducing casualties or not, it was the nature of the fightings that made it have far less civilian deaths than older wars, not the technology used, again, if anything the sheer amount of civilian casualties in those conflicts show a rather sloppy job or really nasty tactics used from both sides.
But i keep my stance, if you are going to take your life, you should be willing to risk yours, this is view has nothing to do with the nature of war which is indeed to kill the enemy (definition of enemy is quite.... arguable), im talking about morality and ethics for killing in the first place :P