As a Texan, the stand your ground clause isn't meant to be used for you to go looking for trouble. The law is meant to be used if you're jumped on while you're otherwise doing nothing and in fear for your life. This doesn't mean you can shoot police because while your life could be threatened by them, it usually is because you were already in the wrong. At the same time, if you go somewhere and people look suspicious the last thing you should do is get out of your car and follow them, that's not fear for your life. I live near a city where I see strange shit go down all of the time, I've seen people fighting and pulling weapons and stuff like that. What do I do? Call the police. I never hesitate to call the police and they never have to tell me to maintain my distance. The only time you can interject like Zimmerman did is if someone is attacking someone else and you see it, and even then you have to use appropriate force.
Stalking and harassment are against the law too. And all of this stuff floating around on Facebook and the like about how wearing a hood makes you look like a criminal is irrelevant. I heard someone in a coffee shop speaking when I was getting up to leave and they said "If you look like a criminal than you probably are one". Sorry, but being black and in a hood aren't justification to be shot. Hell, being a criminal isn't really one either. Shooting is for serious crime, home invasions, things when you and others around you are in danger.
In closing, I'd like to pose the question: Does anyone really think that the streets are safer without this kid? What about with this lunatic running around armed and on the neighborhood watch? Do we want him out there?