I didn’t hear Trayvon had drugs in his system. If true, depending on the levels, certainly drug use could impair his judgment.
The media is blind to Trayvon’s motivation. He was on suspension from school, and probably pissed that someone was calling the police on him to get him in more trouble. Plus he was visibly taller and younger and would think (accurately) that he could beat Zimmerman up. Did he know Zimmerman was talking to police? Certainly Zimmerman was on the phone through most of this, I’d assume he was calling police.
To any impartial observer the drugs, Trayvon’s status at school, would be very relevant to understanding what happened.
Trayvon had pot in his system, we knew he was a druggie and we could assume that the walk to the store was to get away from dad and get high.