People who block the way for others: They stand in doorways when others are trying to pass, in food markets they park their shopping cart in front of the shelves so no one else has access and then stand there reading all the labels, they enter an otherwise empty parking lot and park 6 inches away from my car door, they walk into an otherwise empty coin laundry and use the machine right beside mine so as to create a maximum blockage of movement for no reason, they stop their cars in parking lot entrances for no apparent reason so as to block others and cause the car turning in behind to block street traffic, they sit at traffic lights after the light turns green obliviously lost in "thought" or head-banging to loud music, etc, etc