Currently there are no rules but AI posting shouldn't be allowed for people to just copy and paste responses with no effort. In certain circumstances it could be ok as long as it's quoted and noted that it's AI generated content in a similar way that another's work you are relaying should be quoted and sourced. If it's not then it's the same as plagiarism to me.
In that case, the administration should take a position that would be clear, and if everyone (or the majority) shares your opinion, then it should not happen that some members, even after several dozen reported posts do not receive even a temporary ban due to the use of AI. If using AI inappropriately is the same as plagiarism, I guess the punishment should be the same.