I have never heard of it first hand, though like all phobias, I am sure it somewhat common. As an example, a friend had surgery for a badly broken bone, he end

I have never heard of it first hand, though like all phobias, I am sure it somewhat common. As an example, a friend had surgery for a badly broken bone, he ended up with a metal rod in his body. He was given the option to have it removed, but most people, including himself don't take it. The risks of complications are higher than if left in place. My grandparents considered cochlear implants but didn't take them, not because of the fear of implants, but because they were rather experimental at the time and expensive. So they went to regular hearing aids until tech improved. As for pacemakers, people who I know have them are much more worried of the underlying heart condition than of the device.