Social media text data are often used to train Machine Learning (ML) models to identify users exhibiting high-risk mental health behaviors.However, sharing this sensitive data poses privacy risks and limits the growth of benchmark datasets.We comprehensively evaluate whether privacy-preserving ML techniques can enable safer data sharing while preserving performance.Specifically, we apply federated learning (FL) and Differentially Private FL for two widely-studied mental health prediction tasks: depression detection on X (Twitter) and suicide crisis detection on Reddit.We simulate realistic data-sharing scenarios by treating each user as a client in a non-IID setting, evaluating across different client fractions, aggregation strategies, and privacy budgets.While FL achieves comparable performance to centralized training (centralized 𝐹 1 = 85.63; best FL model 𝐹 1 = 83.16) on depression identification, we find that Differentially Private FL has a large performance-privacy trade-off (up to 𝐹 1 = 27.01 drop) even with low levels of noise (𝜖 = 50).This is due to the distortion of highly informative yet sparse mental health linguistic markers related to mental health, like health topics and emotion words.This research empirically demonstrates the potential and limitations of current privacy preservation techniques for mental health inference tasks.

Content moderators review disturbing content to protect social media users, often at significant cost to their mental health. Recent reports document the mental health conditions of African moderators as notably problematic. Beyond the content itself, what factors contribute to the deteriorating mental health of these workers? We surveyed 134 moderators across Africa to understand their mental health and interviewed 15 moderators to contextualize their experiences. We found that African moderators suffer from high psychological distress and lower well-being compared to moderators in other areas. Former moderators showed significantly higher distress levels, demonstrating long-term impact that extends beyond their moderation work. Our interviews showed that systemic and structural labor conditions contribute to moderators’ severe psychological distress and diminished mental well-being. Corporate wellness programs promoted by platforms were found ineffective and inadequate. We discuss how this requires holistic attention and structural solutions by all involved parties to improve moderators’ mental health.

The rapid expansion of the AI industry relies heavily on the production, verification, and maintenance of data, otherwise known as "data work". Companies outsource and offshore this work through global AI supply chains that operate under exploitative conditions. Drawing on semi-structured interviews with Kenyan data workers across platforms and BPOs, this paper examines how such conditions take shape and persist. We argue that workers are caught within a regime of entrapment, a system of interconnected mechanisms that make it difficult for workers to leave or improve their positions. These mechanisms include the push to invest in the promise of ‘AI’ jobs, the use of precarious contracts to govern workers, the capture of regulatory institutions, and the exploitation of global labor arbitrage. Using complementary lenses of neoliberal governmentality, precarity, and supply chain capitalism, we analyze why labor mobilization in this sector remains uniquely constrained. We conclude by outlining an orientation for research and scholarly practice that can support workers’ organizing efforts and contest the structural conditions sustaining this regime.