Representations of violence are not new. In fact, violence has been a key part of media since the birth of literature: Ancient Greek poetry and drama frequently portrayed murder, suicide and self-mutilation, many of Shakespeare’s plays revel in violence, torture, maiming, rape, revenge and psychological terror, and some of the most popular books of the 19th century were “penny dreadfuls” that delivered blood, gore and other shocks to the lowest common denominator.
No one knows better than the communications industries that children and youth represent a huge market, due to both their own spending power and their influence on family spending decisions.
While parents may find certain representations of violence wholly appropriate for young people, there is a wide continuum of content that exists online and in the media. Anything from a cartoon cat having an anvil comically dropped on his head to video images of real life injuries and deaths can be accessed online by children and youth.
It is difficult to set down in a definitive way what effect media violence has on consumers and young people. There are a number of reasons for this, but the main issue is that terms like “violence” and “aggression” are not easily defined or categorized. To a child, almost any kind of conflict, such as the heated arguments of some talk-radio shows or primetime news pundits, can sound as aggressive as two cartoon characters dropping anvils on one another.
The video game sector is the fastest growing entertainment industry and second only to music in profitability. Global sales of video game software hit almost $17 billion U.S. in 2011. 
As concerned adults, we also need to recognize when our anxieties about media violence are used to sell us on blanket censorship, ideology, and a variety of products.
Teens use the Internet as much, and in similar ways, as adults. But they also often engage in risky behaviour such as downloading illegal copies of movies and music. Popular social networking sites, like Facebook, can also expose teens to a variety of security risks.
Questions about media violence have populated the headlines for almost as long as mass media has existed. Every few years, there’s a new line up of suspects: music, video games, television shows, and movies.
Children may be particularly at risk online because they’re not always aware of the risks associated with what they’re doing. For that reason, children need close supervision when using digital devices and also need to be taught basic cyber security skills as early as possible.
Many online threats are covered by existing civil and criminal law in Canada and other countries. In addition, many countries have specific legislation to deal with online crime. This section looks at Canadian and American laws that apply to cyber security.