Don't just say "no." Tell it what to do instead. It's a busy beaver; it needs something to do.

Just saying "no" is unclear. LLMs are still very sensitive to prompts. I would recommend being more precise and assuming less as a general rule. Of course you also don't want to be too precise, especially about "how" to do something, which tends to back the LLM into a corner causing bad behavior. Focus on communicating intent clearly in my experience.

It's a machine, it doesn't need anything.

I mean OP's example is for sure crazy, but it's true that saying "no" was not necessary at all. They just needed to not prompt it for the same result.