Seriously? You were never a kid? Never made any mistakes? Never did anything stupid in your life? Ya, what the kid did was stupid and in this case he paid for it with his life. I think that's enough right? The rest of the world doesn't need to pile on and mock him.
Yes I have kids and yes I've spoken to them about this issue. Should his parents have done the same? Ya, probably... but if what his mother said is true and they don't have any toy guns that she knows of then it probably didn't occur to her.
This is a tragic event, we don't need to go around calling him a thug, I think he's paid enough for his "crime".