Cyber bullying involves tormenting, threatening, harassing, humiliating or embarrassing someone using the internet, mobile phones or other digital technologies. It must involve minors on both sides. Direct attacks can include mean messages through social media, texts, emails or websites. Bullies may also act through proxies by hacking accounts or impersonating the victim. Reasons for cyber bullying include anger, revenge, entertainment or a desire for power, though motives vary. It can affect children of all ages and lead to anxiety, depression or withdrawal from activities.