something happens to most people when they are on their cell phones. their brain tunes out everything and everyone around them, they forgot how loud they are talking, they forget to look both way before crossing the street; if it's raining, they forgot their umbrella may be poking someone else's eye out. All of their focus is put towards hearing and responding to that little piece of metal they have in their hand, up against their ear. Is that call really that important, they forsake everyone around them? Including themselves? Is the call an emergency? I doubt it.
I applaud everyone for wanting to stay in constant contact with their family and friends and work but there is a time for everything. A time to be by yourself, a time to share with your family and friends and a time to connect with society. When you are walking down the street or walking into a fish market that is time to connect with society.