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.