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Experts Link Online Violence to Emergence of '0 to 100' Killers

The rise of extreme online content raises concerns among criminologists about its impact on real-life violent behavior.

01 March 2025 · 11:50 UTC

The emergence of ‘0 to 100’ killers—individuals who transition rapidly from viewing extreme online content to committing acts of violence—has prompted criminal justice experts to explore the potential connections between internet exposure to violence and real-world crime.

This class of offenders includes individuals such as Nicholas Prosper, who was convicted of murdering his family, along with attempted mass violence against a primary school.

Jonathan Hall, the independent reviewer of terrorism legislation for the government, has identified a so-called “new threat cohort” that encompasses individuals who have been radicalized online and those who have immersed themselves in harmful online content.

He noted common characteristics among these individuals, such as social isolation, a predominance of males, and often underlying neurodivergence, stating that the internet plays a critical role in facilitating access to harmful ideas and justifications for violence.

In a report commissioned by the Home Office following the Southport attack, Hall is examining whether incidents of mass violence should be classified as terrorism.

While he refrained from suggesting an expansion of the terrorism definition, he emphasized the importance of learning from the management of these cases to inform responses to rising youth violence.

Emeritus Professor David Wilson of Birmingham City University acknowledged the growing body of research into the links between online violence and offline behaviors.

Unlike earlier studies that dismissed fears about media violence, Wilson pointed out that social media algorithms expose users to increasingly extreme content, potentially correlating with an uptick in violent offenses.

He cited a troubling pattern among first-year criminology students, all reporting exposure to graphic content such as beheading videos, which aligns with a trend of individuals bypassing gradual escalation in criminal behavior, thus directly committing murder.

Greg Stewart, a criminal lawyer and former youth justice lead, expressed concerns that the current youth justice system is failing to address the needs of children who exhibit exceptional or extreme behavior.

He indicated that the traditional model of escalating delinquency has been disrupted, resulting in more individuals progressing rapidly to serious offenses.

He highlighted the overlap between neurodiversity, obsessive behaviors, and the potential for online radicalization.

Julia Davidson, a professor focusing on criminal justice and cybercrime, described the prevalence of violent online content as a potential public health crisis.

She noted young people's experience of social pressures to consume violent media and the accompanying toxic masculinity propagated by influencers.

Davidson pointed out that the discourse around the Online Safety Act has evolved to address the risks of violent online content, in addition to its original focus on issues like child sexual exploitation and cyberbullying.

Ofcom's policy director for child safety, Almudena Lara, recognized that children are increasingly exposed to a mix of violent content, including material that promotes hate and misogyny.

Ofcom is working to ensure platforms do not inadvertently promote violent content to children, although Lara stressed the challenge of addressing the cumulative impacts of such exposure on young people's attitudes towards violence.

Legal expert Prof Lorna Woods expressed skepticism regarding the efficacy of self-regulation by social media platforms, suggesting that current measures, reliant on content removal, may fall short.

She advocates for a move towards a more integrated approach to safety by design within digital platforms, aiming to better protect users from harmful content.