Examination of the language practices of two girls’ peer groups over time reveals ways in which members actively police their social order, sanctioning those deemed violators of local social norms. Rather than attempting to maximize affiliative actions, a form of human sociality emerges where members openly degrade violators and deny them a ratified participant status in local activities. Through this study I attempt to understand the interaction/social structure nexus by describing the range of linguistic practices through which identities are linked to specific actions within interactions. This article is written in Spanish.