Nah, GPT's output can be very valuable and insightful. But you don't get it with a low effort "please summarize the key points of the text below\n\n{paste some text here}".

I propose the rule to be what it is already: put some effort into your comment, make it add something instead of just taking space and attention. This works for human and GPT and human/GPT ensemble commentary. And the prescription for low-effort spam? Downvote and flag.