FOOD LION REPRESENT! You don't EVER open your window for people, much less your door. That guy preyed on you because you're just an innocent looking kid. He asked you if you were racist because he knew you would never say 'Yes' and the question itself is a psychological manipulation to immediately put you into a pity state thus raising the chances that you would give him money. This can't happen if you never open the window or the door. You should carry around a sign that says, "SORRY, I'M DEAF" just for situations like this. And if they press it, just go cross eyed and start making elaborate sign language gestures and loud unintelligible vocal noises whilst drooling. Good luck dear.