Cyber harassment refers to online harassment. Cyber harassment or bullying is the use of email, instant messaging, and derogatory websites to bully or otherwise harass an individual or group through personal attacks. Cyber harassment can be in the form of flames, comments made in chat rooms, sending of offensive or cruel e-mail, or even harassing others by posting on blogs or social networking sites. Cyber harassment is often difficult to track as the person responsible for the acts of cyber harassment remains anonymous while threatening others online. This usually applies to school-age children.