Parents can be subjected to scrutiny and judgment for their parenting choices. Much of this scrutiny is experienced online, especially around stigmatized topics such as divorce, custody, postpartum depression, and miscarriage. Prior theory suggests that parents might be able to access greater support online when anonymous, but other evidence suggests that anonymity may increase bad behavior. Drawing from ten years of Reddit parenting boards, we show that parents are more likely to discuss potentially stigmatizing topics using anonymous ("throwaway") accounts. We find that, on average, throwaway comments are more likely to receive a response, receive more responses that are longer, and receive responses that have higher karma scores than topically similar comments posted by non-throwaway accounts. We argue that self-identified throwaway accounts provide a crucial environment for supporting …