I almost emailed dang this morning to offer to help out tho I'm not particularly technical. Few solutions I thought of: 1 - honeypot, hide some links llms can follow if stuff gets posted in it, unlikely to be a human. 2 - Make an captcha that only llms can answer, I recently made 2 social networks, one that humans couldn't join by making the submission question too difficult to figure out quickly. 3- Use an LLM to detect LLMs, the other social network I did for fun (that a small number of people use), an llm that looks for moderation issues does a good job of flagging them. 4- Invites but vary the number you have to give out by account age + karma. The first 3 seem like they'd stop some % for some time, but eventually get old.