Senators demand answers from TikTok over experiment that disabled safeguards
Two US senators, Marsha Blackburn and Richard Blumenthal, have demanded TikTok answer questions about an internal experiment that deliberately disabled a safety feature for 15 million American users, one of whom was a teenager who later died by suicide. In a letter to TikTok chief executive Shou Chew and US business head Adam Presser, the senators branded the decision "depraved" and set a deadline for a response, intensifying scrutiny of the platform's algorithmic practices and its handling of vulnerable young users.
According to a Bloomberg report cited in the letter, TikTok intentionally switched off an algorithmic safeguard, designed to stop users being overwhelmed by harmful content, for 10% of its US user base to test whether the feature reduced engagement. Among those in this control group was 16-year-old Chase Nasca, whose feed reportedly showed him thousands of videos about sadness, suicide and loneliness before his death. The senators have posed 13 questions, including which employees knew of the experiment and why minors were included in the control group, and want a full list of similar experiments involving disabled safety features, with a response due by 1 September. TikTok has not yet commented.
- Senators Blackburn and Blumenthal demand TikTok explain a safety-disabling experiment.
- 15 million US users, including a teen who died, were affected.
- TikTok has until 1 September to answer 13 questions.
Both sides, in good faith
The strongest fair case each way — we don't pick a winner.
The case for
Senators argue that TikTok's decision to deliberately switch off a safeguard meant to shield users from being overwhelmed by harmful content, purely to test its effect on engagement, reveals a troubling willingness to treat user wellbeing as a variable to be optimised against profit metrics. Given TikTok's vast reach among young and vulnerable users, they contend that congressional scrutiny and transparency requirements are necessary because platforms have shown they will not always self-regulate when safety and engagement pull in opposite directions. Demanding answers, in this view, is a proportionate and responsible response to protect the public from decisions made behind closed doors that could have real psychological consequences.
The case against
TikTok and its defenders would argue that internal A/B testing and feature experimentation are standard, industry-wide practices essential to understanding how design choices affect user experience, and that testing a safeguard's impact is not the same as intending harm or permanently removing protections. They may contend that such experiments are typically time-limited, monitored, and used precisely to make more informed decisions about safety features going forward, and that treating routine product research as a scandal risks discouraging the very testing that helps companies build better safeguards. From this perspective, congressional pressure risks conflating legitimate research methodology with wrongdoing, and could push platforms towards less rigorous, less transparent internal evaluation out of fear of political fallout.
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