Very important topic! As a parent this is something that is very familiar. I think that with respect to Cyber bullying, the very nature of digital media is possibly more challenging than old school bullying. If you write a cruel remark to someone, it is persistent, it remains there every time that you look. In real life, a cruel remark spoken out, fades with time. So I tell our kids not to write angry words or remarks in messages, but rather when facing the person in reality.