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Zurich University AI Researchers Ran Secret Test On Reddit Users
The undisclosed experiment prompted backlash from moderators and a firm response from Reddit’s legal team.
Researchers from the University of Zurich quietly ran a months-long experiment on Reddit’s r/changemyview (CMV), using AI-generated comments to test how persuasive large language models (LLMs) could be. The subreddit, home to 3.8 million users, invites debate on controversial opinions — but moderators say the AI replies crossed ethical lines.
“The CMV Mod Team needs to inform the CMV community about an unauthorized experiment conducted by researchers from the University of Zurich on CMV users,” moderators wrote, calling the study “psychological manipulation”.
The experiment involved AI-generated responses written under fake identities — including a trauma counselor, a sexual assault survivor, and a “Black man opposed to Black Lives Matter”. These posts were crafted to sound human and emotionally resonant. Some remain accessible via an archive maintained by 404 Media.
The researchers went further by tailoring AI replies using personal information inferred from users’ Reddit history — details like age, gender, and political leaning, all generated using another AI model.
Moderators say this violated subreddit rules, including bans on undisclosed AI use and bots. They’ve filed a formal complaint and asked the university to halt publication of the research.
Reddit responded strongly. Chief Legal Officer Ben Lee called the study “deeply wrong on both a moral and legal level”. Reddit has since banned the accounts involved and is improving its ability to detect fake or AI-generated content.
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“We have banned all accounts associated with the University of Zurich research effort,” Lee said. “We’re also working with the moderation team to ensure all related content has been removed”.
The researchers maintain the study was approved by their university’s ethics board and claim it offers valuable insight into how AI could be misused at scale. “We believe the potential benefits of this research substantially outweigh its risks,” they wrote in a Reddit comment.
But CMV moderators pushed back. “People do not come here to discuss their views with AI or to be experimented upon,” they wrote. “People who visit our sub deserve a space free from this type of intrusion”.
News
At I/O 2026, Sundar Pichai Concedes AI Must Deliver Real Value
Gemini 3.5, a personal agent called Spark, agentic shopping, and Android XR eyewear are all aimed at making AI feel useful, not just impressive.
Google’s annual I/O developer conference (I/O 2026) has recently become a status update on the same question: can the company turn its AI spending into products people use every day? This year, chief executive Sundar Pichai described Google as being in a phase of hyper progress, while conceding this is the part of the cycle where people want to see real value in the products they use on a day-to-day basis.
The strategy on display was to push agents — AI systems that act on a user’s behalf — into nearly every Google product at once. Search now has an “intelligent search box” that returns generated explainer videos alongside links. Gmail, Docs, YouTube and Maps are gaining their own agent layers, including a Docs Live feature that turns spoken instructions into drafted text with citations.
Two new models, Gemini 3.5 and a cheaper Gemini 3.5 Flash, arrived the same day. Google says 900 million people now use Gemini, and that more than 50 billion images have been generated with it. The pricing tier names are likely to confuse buyers: a new AI Ultra plan launches at $100 a month, while the older Gemini AI Ultra drops from $250 to $200.
The flashier announcements were Gemini Omni, a video generator pitched as a more realistic answer to OpenAI’s discontinued Sora 2, and Gemini Spark, a personal agent that handles recurring tasks across a user’s Google account. A new universal shopping cart lets agents complete purchases across multiple retailers from inside Google itself, placing the company between the merchant and the buyer, and also owning the checkout.
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Google also confirmed its Android XR eyewear, built with Samsung and frames from Warby Parker and Gentle Monster. Audio-only glasses ship this autumn; a display-equipped version, which would superimpose live translations into the wearer’s field of view, is still in development. Both sets translate, however only the display version shows you the result.
What Pichai did not resolve is the bargain underneath all this. An agent is only useful to the degree it knows your calendar, your inbox, your shopping history and your physical surroundings. Google has now confirmed that, in time, the same context may carry advertising.
