From Cracked:
We've mentioned before that movies still inexplicably revolve around prejudices that we thought we had outgrown decades ago, but that can at least be attributed to the age of the medium. Movies came into their own nearly a century ago; those prejudices are likely just strangely persistent moral throwbacks. But video games are different, because they're ours, right? There's no reason to inherit our grandparents' bigotry because we made these things up: We've set the standards, we've made the rules and we know that being racist, sexist, homophobic jerkholes is wrong ... don't we? Then how come this stuff is still happening all up in Mario's grill?........................
5 Prejudices That Video Games Can't Seem to Get Over | Cracked.com