>> reporter: we've seen how hard it is, even for adults, to confront a bully. and we've heard how devastating the effects of bullying can be. >> it made me honestly feel horrible. >> it was like really hurtful to me. >> i couldn't concentrate in class. >> reporter: so far, no one has directly called our bullies out. but there's someone in our last group who should be up to the challenge, 15-year-old kailyn. her parents say they've always talked to her about how to deal with confrontation. and after she was bullied she started an anti-bullying campaign. >> they've had meetings after school and kids have made posters throughout the school and that kind of stuff. >> reporter: she also has a brother with special needs, which has made her even more empathetic and protective. with all these experiences,