Someone has been reading far to much of schlock the mercanary webcartoon and its nano boosted soldiers.
Magnets small enough to exist in the body won't influence anything unless in large, very large quatities, like going for your vacination and they hook you up to an intravinece drip!
computor parts, well yes all those spare sitting in computor shops, warehouses are to blame for what ever ills you ant to accuse them of.
So what if a molecule sized graphics card is injected into you, what without a power source, a programe and input is it expected to do?
Satan already controls society through the media, why is he wasting time trying to develop physical means of control, unless it is to confuse the gulible.