Addiction.
In 2007, a man in Guangzhou, China died after playing internet games for three consecutive days. A sad truth is that people can become addicted to video games, like with any other form of media, causing a huge negative impact on their lives. Scientific evidence has shown however that certain individuals can actually be predisposed to addiction, through genetic or environmental factors. There are however, ways to deal with addiction after its onset. Of course regarding video games, careful rationing of play time can prevent interference from important tasks or events.