Glad to read that @ourmaninjapan seems to agree with me :)
https://blog.daniemon.com/2023/06/08/regulating-ai-generated-content/
Yeah, my proposal is just the beginning of an #AItiquette that would evolve.
I think in many cases, a binary classification (_human_ or _robot_) would suffice. For example, I assumed that the image on your post was _robot_, no need to clarify, and no great harm in leaving some ambiguity there. I'm manly concerned about news pieces, (alleged) photographs of influential people or events, and consequential items of the sort.
For more granularity and interoperability, I'd love to see something like [Microformats](https://microformats.io) or similar metadata standardised (there's probably some effort already, I haven't checked).