Cancelling: my GTA IV pre-order

After reading that the version of GTA IV that we'll be getting here in Australia is to be a cut-down version designed to meet the MA15 rating, I've cancelled my order.

Jerks. Why is Australia the only developed country in the world that doesn't have an R18 rating for video games. New Zealand does, the U.K does. (Huh, funnily enough, I'm just about to go to the U.K...)