Cyberbullying is often done by children, who have increasingly early access to these technologies. The problem is compounded by the fact that a bully can hide behind a pseudonymous user name, disguising his or her true identity. This secrecy makes it difficult to trace the source and encourages bullies to behave more aggressively than they might in a situation where they were identified.
Cyberbullying can include such acts as making threats, sending provocative insults or racial or ethnic slurs, gay bashing, attempting to infect the victim's computer with a virus and flooding an e-mail inbox with messages. If you are a victim, you can deal with cyberbullying to some extent by limiting computer connection time, not responding to threatening or defamatory messages, and never opening e-mail messages from sources you do not recognize or from known sources of unwanted communications. More active measures include blacklisting or whitelisting e-mail accounts, changing e-mail addresses, changing ISPs, changing cell phone accounts and attempting to trace the source.
Because the use of mobile and online communications has grown so rapidly and the crime is relatively new, many jurisdictions are deliberating over cyberbullying laws. However, the crime is covered by existing laws against personal threats and harassment. In some cases, it may be advisable to inform the local police department or consult an attorney. It is not recommended that you retaliate in kind because such behavior can lead to heightened attacks, or even civil actions or criminal charges against you.
See Monica Lewinsky's TED talk about cyberbullying: The Price of Shame.