LLM generated submissions should be disallowed

There's a lot of talk about what to do if an LLM generated article gets posted. I don't believe that there's a clear policy about whether they should be allowed. I think users posting them regularly should be banned from the site. A notification on the submission page reminding people that LLM generated articles are not allowed here would also be a good idea. This should reduce the amount of debate on whether the article should be flagged or commented on.