In the interests of provoking reasonable debate, consider this:

Japan has a culture which contains extremely violent comics and animes, and yet Tokyo is a megapolis with the lowest rate of violent crime in the world - far, far lower that any other major city. Perhaps the Japanese are better than most peoples at recognizing the difference between games and reality?

If you play this game, no-one anywhere actually gets raped. It's an illusion on a screen. Likewise, people who watch any of the SAW movies are not necessarily brutal sadists or are any more likely to become one.

There is also the possibility that such things provide a carthetic release, i.e. if you simulate it, you are less likely to do it in real life.

I love playing NFS Undergound, but I would never dream of driving through the city at 180 mph. I love playing FPS's but I'm not inclined to go on a shotgun rampage in the main street.

When all is said and done, it's just a game, an illusion; if you don't like, don't play it.
It's as simple as that.