He had every right to be there!
That is why everyone is so upset.
Wake up battty! Wake up!
Try real hard and apply some logic to the scenario. You are in a neighborhood where you don't belong at night in a drizzling rain and see a man on his cellphone obviously describing you to, assumedly, the police. You start to walk towards him but change your mind and run.
Instead of running home, however, you decide to ambush him while he is waiting for someone to arrive - again, assumedly, the police.
Logic would dictate to any clear-thinking person - even a teenager - the man on the cellphone was a resident calling the police because you drew attention to yourself and looked suspicious and was waiting for them to arrive.
Now, assuming you had the ability to think logically, what would you have done? Put yourself as far away from that man and the situation as possible? Or hang around and ambush him?
Remember, your reputation as a logical person is at stake depending on your answer.