You figure this had to happen eventually, although I'm not sure why it took this long. Hell, I didn't even know there was such a thing as the Sex Worker Outreach Project, but they're protesting Grand Theft Auto too. From their web page:
I think they've got it all wrong. You don't get POINTS for killing prostitutes in GTA. In fact, quite the opposite, you get rewarded with extra health points when you seek them out and pay for their services. GTA celebrates hookers!
Calling on parents to boycott something can be effective, but I don't really see Suburban America logging on to this website in the first place.
Hat tip: GamePolitics