Trayvon didn't live there - he was visiting his dad. He did, however, have every right to be there.
Zimmerman did live there - hence he was on the neighborhood watch.
The dispatcher did not ORDER Zimmerman not to pursue. He did suggest it, and I agree that Zimmerman was a fool to pursue, but he was not ORDERED to do anything.
Plenty of kids are capable of violence and killing - age is no defense.
I'm not defending Zimmerman - I'm just willing to admit that there are two sides to this story, and want to reserve judgement until they are told.

What is the point of rules that are not enforced?