I almost always wear tinted glasses or shades when I'm in public so people can't see in my eyes to judge me or see just how little I care about socializing and also to be able to look where I want or even occasionally stare at a woman's breasts without her noticing

Also, when I really don't want to be bothered, I walk around with a big studio headset and an mp3 player and blast loud music so people really get the hint to leave me alone.