When I read comments like this, I think about the average Joe who says: "Most people are terrible drivers." Then, someone asks them: "Are you a terrible driver?" They respond: "Of course not. I am an excellent driver." A few people roll their eyes.

    > worthy of an instant ban

First, it is not always possible to identify an LLM-generated comment. There are too many false-positives. Imagine if this system was implemented, and one of your comments was identified as LLM-generated and you were instantly banned. How would you feel about it?