Or big groups of people that could form a vertical line while walking. Instead, they let you know they came as a group, because they form a horizontal line that covers the whole sidewalk, to ensure that no one goes through. They're lucky I don't resort to pushing
Like when you hold the person in front of yous shoulders when you walk. That way there’s no weird “oh someone in the group has to move to the back of the horizontal line we’re walking in to let people walking in the opposite direction go”