Again, take a look at the statistics. Apparently the National Post recently put the Canadian stats in convenient graph form, rather than referring back to that wikipedia table. Here it is:
http://news.nationalpost.com/2013/07/25 ... -offences/It also has a Scribd document published by the Canadian Centre for Justice Statistics that's worth a look.
Intensely violent video games have been around for well over a decade now (GTA1, Doom, and other such progenitors of violent gaming are all from the mid nineties). If you buy into the concept that young people are playing these games, learning to accept violence as normal, and are becoming criminals as a result, we'd have seen the leading edge of that surge in crime by now. What do we see? Well, according to the statistical analysis (rather than all this emotional charged subjective stuff), we see crime rates dropping almost across the board in both Canada and the US. (Canada's violent crime rates aren't dropping the way the US is, but we never got that high in the first place.) That CCJS paper also describes the severity of crimes being committed as being noticeably reduced over the past decade or so.
And according to
an industry report (basically announcing to developers what the current demographics are like), the average age of gamers is 35 - well beyond the point where you could possibly argue people's personalities are that malleable. (The CIA ran brainwashing tests on the American public using LSD and a few other psychotropic drugs and even with that kind of help, the project failed. I think the government actually declassified those records at some point, too.)
What's even worse is the people who single out gaming rather than targeting violence in media in general. The Song of Ice and Fire books are pretty intense, but there's a lot of scenes HBO added to their Game of Thrones series that serve absolutely no purpose. One scene in season 2 involves Joffrey, already characterized as an evil sadistic little shit, having been given a couple of whores by Tyrion (in the books, Tyrion and his merc friend discuss the idea, and decide it's not such a good idea), has one go at the other with a mace. The only possible reason for that scene to be there is to establish Joffrey as an evil, sadistic, abusive bastard, but we already know this. So it's just....what's the word for gratuitous where it's not actually gratifying for anybody?
Oh, and in the 50s, there was the exact same outcry about comic books. Somehow that generation has managed to inherit the nuclear button and not destroy the world. Funny how hysteria about new things keeps cropping up in the exact same tone. (To use an older example of recurrent hysteria, the adoption of both locomotives during the industrial revolution and the adoption of the automobile several hundred years later both claimed that they were hazardous because young women would see the oncoming, extremely fast metal thing, shriek, faint in its path, and thus get run over.)
Personally, I think violence in fiction, regardless of the medium, is vital to society. Since I'm not a world famous author, and I know of an essay written by someone who is on this exact topic, I'll just provide a link to Mr. Stephen King's "Why We Crave Horror Movies."
http://hacknslashmonthly.blogspot.ca/20 ... ovies.html (Horror movies are just the flavor that King responds to - for my parents, it's crime shows) If it's too long, the gist of it is we all have something dark inside, and fiction can satisfy it in safe, controlled doses, rather than building up until we lash out at something in real life where there are consequences.
All that said, do I think children should be playing Grand Theft Auto or Call of Duty? No. But they're rated M by the ESRB (or PEGI 18+ for European games). Should children be taken to see R rated movies? No. (Well, unless it's a particularly exceptional child (as in, able to understand the message) and it's a movie like Schindler's List rather than Fight Club. (I think my Social Studies 11 class watched Schindler's List in high school, and some of the kids were laughing and cheering the scene where Amon Goeth was picking off Jewish workers in his camp for taking a second to catch their breath, etc from his balcony. The teacher was not impressed.) The rating systems are there for a reason - they're there to inform you what kind of content you would expect. Heck, the ESRB does a better job than the guys who do the movies - a movie can be rated R for dozens of reasons - the ESRB will list each criterion the game meets for being rated T or M or whatever.
And, by the way, Behavioral modification through positive reinforcement can only tweak behavior for established minds (which is the intended target of GTA - Rockstar doesn't market to kids, largely because they know how much shit they'd be in if they did). The only cases where I really see it producing behavior that is actually unnatural is in pet training. People's minds are complex enough to know the difference between the game world and the real world. (If we ever developed Matrix-esque virtual reality systems, we'd probably want to take a good hard look at what we're doing, but the difference between pixels on a screen and living breathing people is apparent to the vast majority of us.
(Note that in every single one of these mass shooting cases, the investigation invariably uncovers significant mental instability. When a person is in that state, they can latch on to a fantasy regardless of whether it's a video game, a movie, a book, or a random thought in their head that just won't go away. It's a failure of the mental health system. (Personally, I blame the lack of residential care - a lot of the homeless folks I met in Vancouver could have benefitted greatly from that kind of help (even if it was just a decent bed and some help with grooming). The problem with that is the political backlash of historical abuse of patients in such facilities is still too strong.))
The problem is when you cross the line from fictional entertainment to live entertainment. Which is exactly what this law is intended to address. By purchasing footage of rape, you are providing a financial incentive for the rapist to rape more people. (And by the way, this isn't new behavior - I've heard some stories from some family members who attended the less pleasant schools of their towns, involving the entire school turning out to watch the popular jock beat down some poor bastard for some imagined slight - even one incident where someone handed said tormenter a heavy chain to use as a whip. So there's a lot of people drawn to the idea of witnessing extreme violence. Fortunately, in this specific case, someone had wised up earlier on and called the cops, who showed up in time to prevent the chain actually being used.)
I must admit that I'm too young to remember Dan Quayle (I barely even remember Cheney, and I actually did care about world politics at that point), so I can't comment on the specifics. But I find it rather hypocritical for a man supporting the republican party to talk about family values or the like. I might be poisoned on the Republican party by the likes of GW Bush, John McCain and the gaggle of twits they had competing for the right to lose to Obama last year, but the Republican party only seems to value having an army big enough to conquer the world at a moment's notice, and figuring out how to get as much money as possible compiled in as few bank accounts as possible. These are the people who still harp about abortion being a bad thing and spout that wonderful little myth about women having some mystical ability to reject a pregnancy caused by rape. (That last bit, fortunately, is finally starting to fall by the wayside, but I'm pretty sure I hear it every 4 years the GOP spins up its campaign of madness.)
As for actually taking action - stepping up and doing something about something...if you mean greater causes, a lot of that is a matter of opportunity. I can't build houses for the poor and give them away, for instance, but I can volunteer to help do so. And so, I do. If you mean an incident where you have the opportunity to stop something from happening, like a mugging on the same bus you're on, that kind of response comes from a part of our brains that most of us aren't familiar with - we can't say for sure what we'd do in the heat of the moment until we've been there. And that brings us back to the caveman survivalist mentality. Altruism does have a degree of survival value, but when it's for some random person you don't know, it's an awfully big step to take. Part of military training is about getting used to the fight or flight mindset, and learning to control it so you can still do your job in a combat zone where every instinct is telling you to just run for the hills.