"Electric Soldier Porygon" - Pokémon
This episode of Pokémon was not inappropriate nor offensive, but physically dangerous. "Electric Soldier Porygon" featured tons of flashing lights that ended up causing hundreds of hospitalizations in Japan. Flashing lights can induce painful headaches, seizures, and other serious health problems. The episode was cut and never aired anywhere else in the world. This was before flash warnings became a thing!