They are no longer "kids" when they are armed, in a group, and more than likely inebriated. They are no longer kids when they are acting with premeditated intentions. That age group is probably the most reckless and therefore most randomly violent faction in the city. That age group murdered my roommate, physically disabled another friend, beat the crap out of and robbed another friend by knocking him off his bike, which they stole, robbed me at gun point and frequently targeted places I worked, and bars I hung out at.