You don't need to intentionally create a radio receiver to inadvertently pick up EMI. Simple thin wires will end up with this same parasitic current problem, by

You don't need to intentionally create a radio receiver to inadvertently pick up EMI. Simple thin wires will end up with this same parasitic current problem, by nature of their shape and composition. Shielding around these thin wires can be impractical in many situations due to the limited space afforded by the brain and skull.