The irony here is very amusing. I assume that this is a problem largely from people at Apple walking around paying closer attention to their phones and tablets than their surroundings. The National Safety Council added “distracted walking” as a “new” major cause of injuries. Here is a webpage from the American Academy of Orthopaedic Surgeons devoted to discouraging people from walking off of curbs, falling down stairs, and walking into windows while playing with their electronic devices.