User intervention against incivility is a significant element of democratic norm enforcement on social media, and feeling personally responsible for acting is a vital prerequisite for intervention. However, our insight into how users construe their sense of personal responsibility and expectations of other users remains limited. By theoretically foregrounding user perspective, this study investigates the boundaries and nuances of user responsibility to intervene against incivility. Empirically, it draws on 20 qualitative vignette interviews with young people in Germany. The findings show that as contexts collapse in users’ newsfeeds, the imagined boundaries of personal public spheres and own social relationships with uncivil users serve as heuristics for hierarchizing and delimiting personal responsibility to intervene. Beyond abstract individual responsibility for the public discourse, practical responsibility is distributed among personal public spheres.
