To each his own Paul.

Personally, when you are telling a child not to do something, don't you think it only makes sense to tell them why? "Don't play with matches because you can get burned!" "Don't play with matches because you can light the house on fire!"
The list goes on and on. It all comes down to common sense. Like I said..it doesn't take a rocket scientist to figure out that there is a very good chance that when you're dealing with fire, something is going to get burned.
Your assuming a 10 yr old has the cognitive development of an adult. Here, this link will get you started if your interested in reading some of the pioneers of childhood developmental stages (Erikson, Piaget, etc.):
http://chiron.valdosta.edu/whuitt/col/cogsys/piaget.html
Point is, a child of 10 thinks differently and has a vastly different understanding of consequence then a 16 year old. A child of 10 doesn't have the same "common sense" as an adult.
As far as the negligence goes...its the parents that are neglegent and responsible for their childs actions. Again, you can't expect a child, much less a 10yo, to know right from wrong unless they're told.
Again, the child could have been told. But, kids do stupid ****, by adult standards. This isn't always anyone's fault (parents, schools, society, etc.); it goes back to developmental stages and understanding consequence as I previously mentioned. That doesn't mean that the kid should have his life ruined for a childhood mistake, or that the parents should receive the same punishment. None of that would bring the burnt homes back anyway.
There are a lot of good kids out there who have ****ed around with matches before, and without horrible results. Unfortunatily for this kid, his incident resulted in a tragedy.
Of course, had this been your house that burned down, I wonder if you would feel the same.
O.K.; now here is where conversations usually go south. Right here, your attacking the integrity of my argument by implying that I am being insensitive to those who lost there homes, and that if it was my home that I would want to go after the kid.
Nothing could be further from the truth. Material possessions are not so important to me that I would go after a 10 year old.
Anyway, do some searches and read up on childhood developmental stages and see if that changes your mind. Otherwise, like I said, I am afraid we'll simply have to disagree...