I think if you believe in 'inspiration' then yes, violent games will inspire acts of violence. I remember watching Rambo First Blood when it came out and I remember the feeling of feeling I could take on the world when I came out of the cinema. I think first and foremost the home and upbringing is where conditions are set (and maybe their social circle in their teens?). (I don't play any games so my answer is based just on visual stimulation btw.) There was an horrific case in the UK which I won't go into but two young boys convicted of murder and they seemed to have quite a diet of violent games - plus violent fathers. I feel that when murders or extreme violent acts are reported there is almost no interest in the family or the causes so it's hard to work out why they happen. I always notice when a family member speaks out and disowns them as I think that is an indication of their lack of parenting or lack of good emotional support.
Ha! Knew a guy who conducted studies that were published in scholarly journals to test just this very thing!

can’t seem to recall his conclusions, or outcomes... but I know - despite what you might presume, by looking at him, and how he thought, taught, acted & behaved—I believe he was coming down on the side of “they do have some impact to some people some of the time...” (however I am horrifically paraphrasing here, and that’s putting it mildly..

) he was a massive q.t. fan (Tarantino); would routinely blast beats like wu tang clan to intro duce lectures, and talked like he was street, or from the hood — dressed like it in some respects too. But he probably more accurately would blen d or be a better fit internally, inside all of that, at home in the set of the writers for Big Bang theory..

of he even had a very hip / hop rap nickname for him self (not so different fro m “p diddy,” at the time!) ha..

what a character — smart, funny. Highly intelligent (or extremely intellectual, you get the dealio...) I remember him telling us , of a study on partying where they’d analayze the behaviors of ... ah , well - heck never mind : hate to damage any delicate sensibilities that might exist!

this was a rather raucous crowd (or class room full of students, whom, you had to to kill to get into one of his classes the registrations were so backlogged on the waiting lists! ;D