From a general policy perspective, this episode has highlighted the negatives of the "Stand Your Ground" legislation that has popped up in Florida and elsewhere. Such a conversation may not be permitted by the mods, however.
Specific to the tragedy in Florida, one would think that the 911 tapes show that the law ought not apply--the shooter put himself in a situation to feel threatened, knowingly and willfully, and he knowingly and willfully disregarded what the 911 operator told him: don't follow the young man. That's the police department's job, not the job of a neighborhood watch participant.
The hyperbole is, unfortunately, predictable on both sides--that this was a hate crime on the one hand, and the character assassination of Trayvon on the other.