Two weeks ago in this space, I wrote about Sora, OpenAI's new social network devoted wholly to generating and remixing 10-second synthetic videos. At the time of launch, the company said its guardrails prohibited the inclusion of living celebrities, but also declared that it didn't plan to police copyright violations unless owners explicitly opted out of granting permission. Consequently, the clips people shared were rife with familiar faces such as Pikachu and SpongeBob.