I’m curious if ByteDance could just create a new legal entity and call it TikTak or something.

If you have to verify children’s identity, you have to verify everyone’s identity. This is part of KOSA. https://www.eff.org/deeplinks/2024/12/kids-online-safety-act-continues-threaten-our-rights-online-year-review-2024

That’s really cool (not the auto opt-in thing). If I understand correctly, that system looks like it offers pretty strong theoretical privacy guarantees (assuming their closed-source client software works as they say, with sending fake queries and all that for differential privacy). If the backend doesn’t work like they say, they could infer what landmark is in an image when finding the approximate minimum distance to embeddings in their DB, but with the fake queries they can’t be sure which one is real. They can’t see the actual image either way as long as the “128-bit post-quantum” encryption algorithm doesn’t have any vulnerabilies (and the closed source software works as described).