I don't think it is fair to blame digital cameras/photography alone for the growng eWaste mountain. It is the entire silicon chip age, from washing machines to computers, which is the root cause. eWaste is becoming an enormous problem around the world, but it affects the poorest most, as they are most likely to end up breaking the waste down and being exposed to the toxins released.
eWaste Dump Of The World
eWaste Dump Of The World 2