I heard early on that this particular HOA did NOT actually approve any kind of active Neighborhood Watch program so if Zimmerman claims he was "captain of the Neighborhood Watch program" then he was selected or elected by a body electorate of ONE....HIMSELF.
So any attempt to link him, NW or some variation TO that HOA would be fruitless anyway, because his actions were not in their name but in his name only. Far as they're concerned he acted alone.
WRT trademarking the kid's name I hardly think the parents seek financial gain, it's obviously a move to prevent OTHERS (particularly those with malicious intent) from doing so and I don't blame them one bit.