It's not REALLY the children's fault. They are a reflection of bad parenting imo. And if their parents won't discipline their kids, than the world will through sites like 4chan. Which, I'm actually ok with. It's one thing to kill for food, it's another just to kill it for fun giggling and laughing while you do it. Than video taping it and posting it on the web as if your so funny!
I really hope they are found and humiliated in front of the world. That will teach them to kill in such a cruel manner. If your going to kill puppies because they are pests in your country, do it swiftly and with remorse. Don't video tape it and laugh while your doing it, have some freaking respect.
On a side note I was watching a documentary recently about people in Africa killing each other and carrying human genitalia in their wallets as good luck charms. This is on top of drugs, prostitution, aids, and cannibalism. On the large spectrum of things it's not really that bad, still wrong, but there is far worse going on in the world daily. How can we protect other animals when we have failed to do that ourselves?