No not all, but people who study violence (such as the council on criminal justice) have found that more and more humans lack the (previously thought to be innate) traits of empathy and kindness. We live in a world where shooting people in video games is perfectly OK and causing death is entertainment.

I play God of War (and House of the Dead) so I can't say that I'm above any of that. Only that I see how it dissuades people from being able to care very much and even enables some people to murder others for fun. For every mass shooter who plays violent video games, there's 10 million more playing those same games that aren't mass murderers.

But, and this is the big BUT, violent media (even if it is big business) does inure people to feelings of empathy and compassion, it accustoms people to seeing acts of violence, and it even makes it seem like nothing but a game. These are just my thoughts - not moral judgments about what others do with their free time.