Within criminological research, the infrastructures of the Internet often fade into the background to become part of the context of social action rather than dynamic social subjects of their own. In fact, the decisions which go into the creation of these technologies and the values of the people who make and support them shape in important ways how the Internet's infrastructures and platforms become implicated in crime, power, and control (Pinch, 2010). In this chapter, I draw on interviews and archival research with the community which develops and maintains Tor, an online anonymity infrastructure, to explore how they understand the use of their network for crime. I begin by setting out issues of platform governance more generally, moving to an overview of Tor's history, how it works, and some of the problems it faces in practice. Next, I set out my use of social worlds theory to unpick the complex values of the Tor community around crime, abuse, and control (Star & Griesemer, 1989) and the research methods through which I explored these values. Moving on to the results of this research, I characterise individually three separate worlds of discourse in Tor and how each frames and tackles abuse, crime, and harm in practice. Finally, I discuss the implications of my findings for the study of Internet infrastructures in criminological research.