Previous studies investigating altruistic punishment have confounded the effects of two independent variables: information transmission (or breach of privacy) and personal identification (or breach of anonymity). Here we report findings from a brief study in which participants were asked to respond to a social norm violation (i. e. https://www.bekindtopets.com/flash-find-Purina-Exclusive-Puppy-Food-Chicken-Brown-Rice-super-sale/