SOCMINT (SOCial Media INTelligence) is increasingly considered relevant and cost efficient information, and the exploitation of social media information in the name of security and public safety is generally regarded as unproblematic. We will critically scrutinize this claim and argue that the exploitation of such information by Intelligence and Security Services raises new ethical concerns. Drawing on recent moral discussions about privacy, we will argue that individuals have an interest in privacy in public spaces, including online spaces. We will discuss the role of such public privacy interests and argue that the systematic surveillance of social media platforms by security authorities potentially entail a negative chilling effect.