The platforms, providers, and infrastructures which together make up the contemporary Internet play an increasingly central role in the business of governing human societies. Although the software engineers, administrators, business professionals, and other staff working at these organisations may not have the institutional powers of state organisations such as law enforcement or the civil service, they are now in a powerful position of responsibility for the harms and illegal activities which their platforms facilitate. For this Three Paper Thursday, I’ve chosen to highlight papers which address these issues, and which explore the complex networks of different infrastructural actors and perspectives which play a role in the reporting, handling, and defining of abuse and crime online.