Interesting thread.

It was point 2 that caught my attention. I am absolutely tired of being hit in the shoulder and the head by people walking by my seat with their carry-on luggage. I been bruised, battered and even bloodied with very few people apologizing. One time I grabbed the bag that had just bounced off my head and yanked it. As I am bald, there is no padding to soften the blow. The flight attendant who was nearby, and saw the entire incident, then chastized the passenger while getting me ice for the bruise on my head. If you have a backpack on one shoulder, and it hangs to the side, what do you think will happen when you get into the confines of the aisles in the aircraft cabin?