What was he doing that was bad? Walking to his father's home? He was a young kid, with nothing in his pockets but a bag of Skittles. He was being followed - at night - by an older armed man. I would imagine he was terrified. I would have been.
As for what proof I would expect to back up your statements, did he have an arrest record? Was he in a gang? Did he have drugs in his pocket? A knife? Those are things that I would classify as "thuggish". Walking home at night isn't.
I don't know how else I can explain my position. Trayvon may have not been doing anything except walking home. Which is why Zimmerman should have, at most, observed from a distance and not confronted him.
But, again, I highly doubt Zimmerman just walked up and shot him. I don't think Zimmerman was just sitting around waiting the the next black guy to walk by so he could shoot him. What has come out so far, plus common sense, suggests Zimmerman confronted him, there was some type of argument, and it escalated into a physical altercation. Enough to where Zimmerman felt he had to shoot. That seems the most probable situation to me. Trayvon didn't need an arrest record, or a weapon, or to be on drugs to react in a thuggish way.
