Excellent points. If Zimmerman was driving his own, unmarked vehicle - Trayvon may very well have been fearful for his own life - which turns out to be tragically accurate.
We have a very serious neighborhood crime watch group and we would never stick our noses into people’s business unless we saw them committing a crime or had good reason to suspect a crime was about to happen. Then we would call the neighbors in danger and the cops.
We expect the neighbors here to be armed and ready to handle problems until the cops come. We help each other to be ready in case. We are not a gated community so there are no rent-a-cops driving around (thank goodness).
If anyone attacked the neighbors while they were out and about, he or she, black, brown or white - hoodie or not - might end up shot.