Dr. Kathy Seifert, author of How Children Become Violent, is an expert on youth violence and violence prevention.
Liberal Democrat AM Kirsty Williams asked whether staff were being given enough training to "scale situations down before they do become violent".
Yet Mrs Arroyo continued to let them demonstrate, insisting that free assemblies were fine so long as they did not become violent or attempt to unseat the government.
Tens of millions of these games are sold and tens of millions of people play them on a regular basis and how many of these people become violent killers?
Let's start with two related questions: If early biological and genetic factors beyond the individual's control make some people more likely to become violent offenders than others, are these individuals fully blameworthy?
The X-Change went well with Professor Pete Vukusic bringing colour and iridescent butterflies to the proceedings, and Clifford Stott getting a rise out of the audience on why people become violent in groups.
These children can become violent, depressed, even suicidal.
One witness who watched events unfold from a rooftop in central Dhaka said the demonstrators "were very aggressive, some people were throwing stones and the situation quickly become violent... the police had no option but to respond".
Asked by the BBC why the students in Jaffna should not be allowed to march in the streets, Jaffna's military commander, Maj-Gen Mahinda Hathurusinghe, said the students have been "categorically told not to" because "they would become violent".
The uprisings in oil-producing countries have not gone away, and indeed have become more violent.
In his interview, Mr. Obama said it was likely the game would change to become less violent.
Sorcery has traditionally been countered by sorcery, but responses to sorcery allegations have become increasingly violent in recent years.
Syrian officials say about 2, 000 members of the security forces have been killed in the unrest, which has become increasingly violent as defectors from the army join the opposition.
"There have always been pickpockets at the Louvre and in tourist locations in Paris, but for the last year-and-a-half the gangs have become increasingly violent, " said museum supervisor Sophie Aguirre.
In a survey of 733 domestic violence shelters across the country, Mary Kay reports that nearly 80 percent have seen an increase in requests for help this year, and almost 60 percent said the abuse has become more violent than before the recession.
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Under Rene Preval, who was elected for a second term in 2006, there has been a small but significant improvement in conditions in Haiti: jobs have been created, the slums have become less violent, and there have been some timid signs of a growth in tourism.
Police and stadium personnel need to better monitor the crowd before people become rowdy and violent.
In subsequent years, Drumcree has become synonymous with violent protest and angry confrontation.
We know that historically when a large producer has turned to world markets those markets have become vulnerable to violent upward spikes.
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The troops went in to disarm inmates in what has become a notoriously violent prison, according to Iris Varela, Venezuela's prison minister.
But after more than six years of continuous anti-cartel operations, the traditional strongholds of the embattled organized crime groups have become the most violent and least stable parts of the country.
Over the course of several weeks she began to become unreasonably irritable and violent.
Instead, we are told that it has become the Global Struggle Against Violent Extremism (GSAVE).
The main character in the film suffers from bipolar disorder, a condition for which there is a risk of violent behavior if symptoms become severe and go untreated.
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But the nature of war appears to be changing, as interstate conflict has become rare to the point of extinction, leaving violent clashes in which civilians are particularly vulnerable.
But nevertheless, researchers at the Indiana University School of Medicine have discovered that "teenagers' brains become fired up" (read: angered) after playing violent video games.
Rather, it is all about how those who are suffering from mental conditions that allow them to conclude that carrying out these unspeakable acts are, somehow, what they are meant to do and how these people are impacted by violent entertainment and the weapons that allow their delusions to become reality.
What has become clear, however, is that he is not doing anything to prevent violent action.
Without a comprehensive public transportation system to overcome the greater city's distances, the middle class has become mostly car-bound and wary of the city's reputation for violent crime.
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