You can not kill a penguin in club penguin. Club penguin is for chatting with other people from around the world, safety. If you think that the Club penguin world is for violence, then the nearest you will get to having violence is having an argument or falling off your sled in sled racing. The pictures or "Would you like to kill this penguin?" or "[Penguin name] would like to kill you? Do you accept?" are sick jokes and are fake.