As a disabled person, I have noticed this to be a huge problem in San Francisco over the past 5 years or so. I regularly get pushed into walls and trees as grou

As a disabled person, I have noticed this to be a huge problem in San Francisco over the past 5 years or so. I regularly get pushed into walls and trees as groups of young people walk by. A courtesy I learned as a young child walking in the financial district with my father was to always get into a single file line when approaching a group walking towards your group. It is also a common courtesy to walk on the right side of the sidewalk, like roadways, when walking against oncoming people. And while I have your attention.. It is also common courtesy, and something San Franciscans have known for years, to remove ones backpack when riding MUNI. Either wear it in the front or put it down between your legs. That way you are not unknowingly smashing people in the face or taking up too much space on a crowded bus.