The Idea
Build a wall around a country, such as Australia, and then mount turrets on it. Move the scumbag chavs there, and to prevent the from escaping, shoot anyone who approaches the perimeter.
David: This is not my idea, so Australians; it's not me you have to kill.
David's Thoughts on Improvements
First off, I am sure this was done in the past, only no walls. Secondly, I do believe the Australians would complain.
Wouldn't a better solution to be to use the North of South Poles, and send all forms of criminal there? Heck, we could even implement my Chav Wheel idea. The inmates would have to run on the wheel to prevent dying of hypothermia.
If this idea ever did come to fruition there are many advantages to it, first, there would no longer be a problem of prison overcrowding. We could tear them down or use them as theme parks to generate a bit of revenue; heck, we could even charge other countries to put their criminals in the new "Super Prison". Hmm, this looks promising: money from other countries, no prison overcrowding, and hamster, correction chav wheel electricity.
Steven: The idea doesn't seem too bad.
David: Ha, there's a flaw in it: the North and South Poles are neutral territory.
David: Balls! I've just ruined the plan… Damn, shit, arse!
Steven: One of the few times I'll say it: LOL.