There's a sign at the entrance of the property that states the area is patrolled by Neighborhood Watch. Assuming Trayvon could read, and I'm assuming he could, he would know that he might be watched....in the neighborhood. This should have come as no surprise. Instead of checking Zimmerman out and running off, he should have simply walked home. Zimmerman was doing nothing threatening -, he wasn't wearing a ski mask (which I have three of in my chest of drawers), or hiding behind trees - Zimmerman was in his truck, calling LE, as he was taught.
Trayvon ran and then, apparently, walked somewhere other than his home. Zimmerman lost him at that point. However they somehow met up again, when Trayvon asked, "why are you following me" and Zimmerman allegedly asked, "what are you doing around here?", Trayvon SHOULD have replied, "visiting my dad down by the entrance gate". Done. Trayvon is on his way - no harm no foul, Zimmerman meets the cops that arrived one minute later and tells them what Trayvon told him and they call it a day.
If Zimmerman is a resident of the gated community, he owns his home and has a right to ask anyone acting suspicious and not known to him what they are doing on the property - especially if they are walking around, looking at houses, staring at him, coming toward him, and then running away.
A 17 year old young man with all the manners and attributes given him by his parents in the press would have politely identified himself when asked. Zimmerman was doing nothing sinister. Zimmerman was not on Trayvon's property.
If the account we are hearing from LE is true, Trayvon should have just answered a simple question - or he should have been closer than 70 yards to his destination if he was "scared".
JMO