"Our study suggests that playing a certain type of violent video game may have different short-term effects on brain function than playing a nonviolent, but exciting, game," said Dr. Vincent Mathews, a professor of radiology at Indiana University School of Medicine in Indianapolis and the study's author.
i can dig it.
i play moderate-to-extremely violent games, usually after spending admittedly too much time coding and/or working my brain around a particularly difficult problem. it helps me relax, and oftentimes when i resume the coding and/or problem solving, i feel refreshed and have a more positive perspective on the situation at hand.
i don't see anything wrong with this, at all.
of course, i understand the concept of cause and effect, action and consequence, and that if you kill a person, they stay dead*; there's no reset button in life.
maybe if parents and doctors spent more time on ingraining these concepts into their children, there wouldn't be an issue with violent games. i mean, there are plenty of violent (and
ultra-violent 
) movies out there; and the violence in books? well, i'm sure that anyone who's actually leafed through a page or two knows that the
real gore and violence never hits the screen. you have to read about it.
so let's all make sure that kids are brought up safe; let's ban and burn all movies, games, and books, and make children pretend to be content staring at a wall all day. hell, for that matter, let's do the same with adults; you never know when one of
them is going to turn out to be overly impressionable.
* at least, they do if you've done the job correctly. 