blind spot camera

Combining the ideas of the blind spot sensor in the mirrors and with the rear-view camera, I thought of an idea to help with blind spots. Sensors can go out at any time so cannot always be trusted, but if Ford would put little cameras (similar to the reverse camera) on each quater panels or on both bedsides if it is a truck. Then wire the camera to come on to the screen when you turn your blinker on (for example, if you have your right blinker on the the right side camera will show up on the screen). Also with this accessory, it'll encourage more drivers to use their blinkers when turning. I came up with this idea when I got hit by a lady while I was in her blindspot and having to get my door fixed on the truck.