A new Cornell University study finds that Reddit moderators view AI-generated content as a serious risk to the platform’s authenticity, usefulness, and manageability — calling it a “triple threat” to one of the internet’s largest discussion communities (Cornell Chronicle, Oct. 20, 2025).
The research, led by Cornell doctoral student Travis Lloyd, reveals that while AI tools like ChatGPT can be helpful in limited cases, most Reddit moderators are deeply concerned about how these tools degrade content quality, weaken social connection, and increase the difficulty of moderation.
Moderators from over 100 subreddits — ranging in size from 10 to 32 million members — participated in the study. Their concerns centered on three main challenges:
- Poor content quality: AI-generated posts often contain factual errors, weak writing, or off-topic responses. One moderator described the posts as trying to “meet the substance and depth” of human content but frequently missing the mark in both accuracy and style.
- Damaged social dynamics: Several moderators feared that AI would reduce authentic human engagement on Reddit. As one put it, AI could “strain relationships” and erode the one-to-one interactions that define community values.
- Harder moderation: Because AI-generated content can be hard to detect, it places a greater burden on moderators — who are volunteers. One moderator from the subreddit r/explainlikeimfive called it “the most threatening concern,” noting the disruption AI causes to the site’s operation.
Still, the researchers found some moderators saw niche benefits. One from r/AskHistorians mentioned that AI tools could help non-native English speakers translate their original ideas into more accessible posts — but they emphasized that the ideas themselves had to be human.
Co-authors on the study include Mor Naaman, professor at Cornell Tech, and Joseph Reagle from Northeastern University. The paper, titled “There Has To Be a Lot That We’re Missing: Moderating AI-Generated Content on Reddit,” was presented at the ACM SIGCHI Conference on Computer-Supported Cooperative Work and Social Computing in Norway. It earned an honorable mention for best paper.
The study was supported by the National Science Foundation.
Naaman emphasized that the future of Reddit’s humanity depends heavily on the moderators, saying, “Reddit, the research community, and other platforms need to tackle this challenge or these online communities will fail under the pressure of AI.”
Lloyd agreed but remained hopeful. “As long as there is a desire for real human interaction — and there is — people will work to protect it,” he said.
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