Every week we read more and more stories of someone who commits suicide, gets fired, gets "canceled", abandoned, or worse, because of a conflict or misunderstanding involving social media. Using theories that originated in studies of extremism and terrorism, Jessica Emami analyzes the processes that drive people to punish others using social media. Professor Emami makes a case that "cyberpunishment" is driven by outrage against our personal sense of morality, and a deep desire for our act of punishment to be acknowledged by others. Moreover, she demonstrates that today's social media platforms are by their very structure unable to curb or resist cyberpunishment.