newest in cyber bullying, thanks to a new crop of apps where anyone can post anything anonymously and mobily, creating a virtual burn book of graffiti and it's happening in schools across the country. >> the fact that op has diabetes makes me happy. how long do we think before ab kills herself? >> reporter: will haskill says comments like this appeared on an app last month and spread around his high school like a virus. trying to raise awareness, he wrote about the new bullying tactic. >> students who were targeted were blind sided. many teachers and administrators downloaded it. it really did take over the high school. >> i tried not to look, but i was fascinated that students were, like i said, capable of making these terrible comments. >> reporter: now that school is on lockdown. electronically. responding to complaints, the creators of the app set up geo fencing using coordinates to prevent the app from being used on school grounds, protecting 85% of all middle and high schools, an unprecedented step. >> we made our app 17 plus, but we as app developers realized how most parents don't kn