[hhjinks]

Prevent pasting comments. Implement a naive check for time spent typing the comment, and shadowban posts that don't pass the criteria. Add a 1 minute wait and captcha for posting.

That'd drastically reduce the amount of low effort posts, both human-written and generated.

[satiric]

Preventing pasting would drastically reduce how often people cite their sources; no one wants to hand copy a long url.

[ttamslam]

I've been working on this tool to address this same issue in other communities: https://www.ityped.it/

It's certainly not perfect, but similar to what you mention.

p: https://www.ityped.it/p/WIiTYfdxQ5ww

[krapp]

Have the output of the LLM sent to a headless browser that "types" and submits the comment as necessary, with some randomness added for authenticity.

Or, since this would need to be done in javascript, just block or rewrite the javascript and fake the output in the sent request.

Simplistic solutions like this stopped being meaningful decades ago.