If electrical devices can be used to bring down a plane, why am I not being stopped from bringing them onto the plane? My 500 ml bottle of water is strictly fo

If electrical devices can be used to bring down a plane, why am I not being stopped from bringing them onto the plane? My 500 ml bottle of water is strictly forbidden. Couldn't a terrorist could come equipped with a collection of gameboys and tamagotchis to bring the plane down?