Nowadays smartphones are used by almost everybody. I think that the human being have the necessity to being instantly informed all day long. When any kind of situation happen there will be always someone recording it or taking pictures. That turns us into citizen reporters. We have the camera, the cellphone signal, and the ambition to send the information to the cyber space to make it free to the eyes of anybody; turning them into judges. However, in cases like the Boston Marathon, I believe that the people who took pictures or videos should have gave all that material to the Police because after bombing, the Police started a man-hunting, so anybody could confuse the face of the suspect with other person and kill them.
I think we have to understand that we are more public person that we used to be, and that we have to be more respectful with others but also being ready to respond to any suspicious event.