The warning is too vague. “May become visible” kind of sounds like Notion doesn’t know whether they will become visible or not.

Please also especially clarify that IDs of contributors will be public. Meh is good, but this was a bit too simple.

There is a way to mitigate this. Re-hash and cache the page to be meta-less for public URLs. I guess that requires a huge amount of coding for a team that has not built the product from the ground up. But I feel like a "copy and paste" could fix that (remove author data).