[JohnFen]

Even if there are no AI generated comments, the very fact that there could be means that every comment will be judged for whether or not they're real. This will certainly some cause real comments to be disregarded.

That's already degrading the quality of all online discussions all by itself.

[pixl97]

In Reddit over the past 2ish years you can find accounts that only contain posts that have been posted on other accounts. They are generally used in context, so they are difficult to see by themselves. I only saw it when I saw the exact same comment 3 times in a thread, and it wasn't stupid repeated quips. Instead looking at each of the 3 accounts and Googling each of the posts in the accounts show the original sentence had been used in the past.

They weren't even bad comments. They fit in to the discussion, yet seeing it cheapened the experience.