Tactical technical communication research suggests its application to social justice. However, beyond a general advocacy of anti-institutional activity, de Certeau’s notion of tactics provides no detailed ethical framework for ethically justifying tactics. In acknowledgement of this gap, this article foregrounds the ethical thought of feminist philosopher Adriana Cavarero, particularly her concept of vulnerability, as a supplement for those employing tactics for social justice causes. The authors examine the technical documents produced by the hacktivist collective Anonymous.