Should Apple hobble FaceTime to battle distracted driving?

Does Apple bear a measure of responsibility for the death of five-year-old Moriah Modisette? Her family think so.
Moriah was riding in the family car near Dallas, Texas, when it was allegedly rear-ended by a man who admitted that he was distracted by using the iPhone's FaceTime video-calling app. The child was airlifted to a hospital but died that night — Christmas Eve of 2014.
In a lawsuit filed in Santa Clara Superior Court late last month, the family charged that Apple knew FaceTi