I lived in the southern-most point of Kowloon, Hong Kong, easily one of the most crowded areas on earth, and also one with the highest concentration of tourists

I lived in the southern-most point of Kowloon, Hong Kong, easily one of the most crowded areas on earth, and also one with the highest concentration of tourists. This never fails; go to the gate of any metro stop and you will find a group of tour-bus idiots holding hands in a road-blocking vigil. How about the Shoulder-to-Shoulder Walkers: the obstructionist quartet of parallel dimwits. Or guy who likes to stand in the middle of the moving walk way when I am running to board a flight (bonus if he has no luggage.)