Today, we can find an online community to suit almost any interest we may have. And yet these communities carry an element of menace. The anonymity associated with online communities allows particularly vicious interplay, where people can pile on others with virtually zero consequences. Using current examples from the news and connecting this phenomenon to historical incidents like the Salem witch trials, this fascinating resource examines an interesting time in the world and grounds it with practical guidelines for being a responsible member of an online community.