Remember Mary Bale, a.k.a. the woman who was tracked down and harassed after someone uploaded a video of her throwing a cat into a trashcan? She's one of the many people who were taught a lesson by the throngs of angry internet users. You can read more about her and 11 others in similar situations over at Ugo. Fair warning, not all of the people actually deserved what they got.
http://www.ugo.com/web-culture/people-who-got-owned-by-the-internet
Pretty sure her identity was figured out?
Maybe that one was too cruel to add to the list.