1) The document discusses the social media app Yik Yak, which allows anonymous messaging within a 5 mile radius. It was popular on college campuses but also led to cyberbullying in middle schools and high schools. 2) In response to bullying issues, the developers used geofencing technology to disable the app in areas around schools. This helped curb bullying but did not eliminate all issues with the anonymous nature of the app. 3) The document also describes the founding and funding of Yik Yak, as well as one student's experience being bullied on the app which led her to start a successful petition calling for changes to curb bullying on the platform.