It appears nobody thought about the pilot. He probably thought his hobby was a safe thing to do. Then out of the blue he's suddenly scarred a young child for life, plus scared the heck out of it. How must he feel? I'm sure I'd be devastated and never fly again. I'm sure he wouldn't have hit the child on purpose, so don't you think perhaps he deserves a little sympathy as well?
Obviously we all feel sorry for the child and it's Mother, but hey! he was doing something the rest of us here do, fly his quadcopter. The fact he lost control could have been one or more of thousands of reasons, not all of them could be something he could have avoided. Let's not condemn the pilot without knowing why he lost control. I'm not making excuses for him, but faults can develop without us knowing about them, so let's not judge him, I'm sure he's going through a tough enough time as it is.
Let's not forget, a few inches lower and the child could have ended up like the young guy who had his Carotid Artery severed by quadcopter and died whilst walking through a US Park. I have to ask, why can't City councils put aside a specific park or parcel of land for city Quad flyers? The pilots could pay an annual fee to fly there and at leat it would help pay for it's upkeep. Then again, some bright spark would probably find some constitution it goes against.