ChatGPT won't tell you how to do anything illegal, for example, it won't tell you how to make drugs.
One would think that if you asked it to help you make drugs you'd want hallucination as an outcome.
But no. Only a very, very small percentage of drug users want hallucinations.
Hallucinations happen usually, when something went bad.
(So a hallucinating LLM giving drug advice might as well result in real hallucination of the user, but also a permanent kidney damage)