Rather than enforcing such rules, more energy should be spent educating people how to use it properly.
That's not Bitcointalk's task. Even if "we" would manage to teach every user to properly use and quote chatbot output, there'd be many others who'd also jump at the opportunity to earn money by posting output from a free language model.
The level of effort which a person or team puts into a project is directly correlated with its likelihood of success.
That's the problem: chatbots reduce the amount of effort to virtually nothing, which means the number of people that can do it goes up exponentially. We'll end up with the
Dead Internet theory:
organic human activity on the web has been displaced by bots