Brain–computer interfaces (BCIs) represent one of the most consequential emerging technologies of the 21st century. While current regulatory frameworks focus primarily on their clinical and rehabilitative applications, a critical and underexplored risk is taking shape: the potential misuse of neural interfaces as instruments of mass cognitive surveillance. This report examines the technical mechanisms by which a BCI system can acquire, encode, and transmit neural data without explicit user consent. It further reviews the inadequacy of existing global data privacy frameworks when applied to brain-derived signals and proposes a tiered ethical framework for neural data governance. Particular emphasis is placed on the disproportionate vulnerability of populations in Sub-Saharan Africa and Uganda specifically where general-purpose data protection laws provide no neural-specific protections, institutional enforcement capacity remains limited, and the convergence of mobile technology growth with consumer neurotechnology diffusion creates a structurally undefended exposure surface. This report argues that neural data requires a distinct legal and ethical classification—one that protects cognitive liberty as a foundational human right before commercial BCI deployment reaches critical mass in both the Global North and, increasingly, in emerging markets.