This chapter examines Europol’s Internet Referral Unit (EU IRU) and its role in the privatized governance of online media within the broader context of transnational law enforcement and European counter-terrorism policy. Established in 2015, the EU IRU monitors online content and recommends takedowns to hosting platforms based on breaches of terms of service, not legal violations. By analyzing the discursive practices of the EU IRU, this chapter seeks to understand the (in)security dynamics of online radicalization and assess associated human rights concerns. The core question addressed is how Europol frames radicalization and Internet content. The chapter situates the EU IRU within the wider discourse on counter-radicalization, arguing for a deeper understanding of radicalization as perceived by professionals in the field. A detailed policy analysis highlights the unit’s referral and takedown activities, scrutinizing Europol’s framing of technology as a security issue and radicalization as a problem exacerbated by online communication. The study reveals significant issues such as over-blocking, lack of due process, and absence of recourse for affected users, emphasizing the ethical and human rights implications of private companies acting as arbiters of speech. The conclusion critiques Europol’s approach, noting its inconsistency and inefficacy, and underscores the necessity of transparent and judicially overseen content regulation. This chapter calls for a re-evaluation of current counter-radicalization strategies, advocating for more holistic approaches that balance security needs with fundamental rights and democratic accountability.