To be honest, I wish the web had standardized on that instead of ads.
I think a clearer parallel with self-driving cars would be the attempts at having road signs with barcodes or white lights on traffic signals.
There's nothing about any of these examples I find creepy. I think the best argument against the original post would be that it's an attempt at prompt injection or something. But at the end of the day, it reads to me as innocent and helpful, and the only question is if it were actually successful whether the approach could be abused by others.
And in fact, it's very possible that the person running the LLM would want to be made aware of this information. Or that they have given their agents access to a wallet so that it can make financial decisions like the one noted here around enterprise level donations that could be in the user's self-interest. They might not WANT to sign off on everything.
Is your view that any writing with any eye towards LLMs is prompt injection? That there's no way to give them useful information?