Australia: Unfortunately for you, you exist in the physical universe. You cannot completely stop children from getting hold of violent games anymore than you can completely stop them ever getting hold of porn. It's just completely and utterly impossible, short of a total police state and Orwellian levels of omnipotent surveillance of culture consumption.
What you CAN do is look at other, more effective systems than your own that have been implemented by other countries...and then implement them. And worry about improving upon them later.
What you CAN do is look at other, more effective systems than your own that have been implemented by other countries...and then implement them. And worry about improving upon them later.