AFAIK in terms of forum policy, this assesment of mine still applies:
If an AI is able to consistently create content that doesn't break any of the forum's rules (good quality, on-topic, not just a padded word salad, no plagiarism, etc, etc),
I, for one, welcome our new machine overlords. Otherwise, content that violates the rules, AI or human produced, can already be dealt with with our current rules and policies in mind.
If you want rules to be made in regards to AI posts, your going to have to petition theymos about it (e.g. make a thread requestint a change in forum policy).