This article aims to introduce the notion of panoptic structures as a way of theorizing how people strategically exploit the affordances of digital devices to expose other people's behavior. I argue that Foucault's notion of panopticism becomes relevant in new ways in social life as a consequence of the polymedia repertoires of networked individuals. Central here is the ability to store digital communication and repost it for selected audiences. The data I analyze here were collected from a group of students who had just entered the gymnasium (the Danish equivalent of high school). During the months of multi-sited, online and offline ethnography, a conflict occurred between two groups of students. During this conflict, a repeated activity involved students confronting students from the opposing group with screenshots of their earlier social media activities and doing so in front of larger audiences of other students. On this basis, I argue that a theory of such panoptic practices belongs in the sociolinguistic toolbox. (Panopticism, social media, conflict, polymedia repertoire, audience)