I don't think anyone needs to disclose the tools they used to write something. Nobody ever disclosed Word's grammar suggestions or spelling corrections, or the fact that they used some autocomplete tool to produce code, so we should they now need to start disclosing this tool. Besides, in it's current state, it discloses itself to anyone paying attention.
I do think people own the output they produce regardless of the tools they use, and if they want to put crappy writing out there with their name on it, that's on them. Even if they do disclose that it was written by an LLM, they're still 100% responsible for the content.
I don't really care about the tool per se, but if I'm reading some LLM output you give me its utility is awfully limited if you don't also supply the prompt. That's what I'd like to see normalized:
Without the prompt I cannot discern what you were trying to do, because the LLM output is basically devoid of any coherent voice. Whether it's code, prose, or pictures don't bother sending it to me unless you also include the prompt text.[edit] I suspect the fact that people are often reticent to share their prompts says quite a lot about how and why they're using an LLM.