Well, here's where we really disagree, I suppose--I think he did go looking for a confrontation, and managed to find it. Much more than he wanted, yes, but still--I believe he wanted a confrontation.
Strangers in your neighborhood should be confronted. This is how responsible people ascertain whether or not someone belongs in that neighborhood. All Martin had to do was turn on Zimmerman and say, "**** off man. I live with my dad two houses down." That would have been the end of it.
Instead, he assaulted Zimmerman. This decision cost him his life, sadly.