Great idea! And fill the yard with shanks, hidden like easter eggs. It would have great entertainment value for overworked, stressed, and convict-threatened and language-abused guards; plus save us taxpayers a lot of money that we spend on food, shelter and, in the case of death row inmates, court appeals and hypodermic needles filled with sodium cyanide.
Probablt best to just put them all on one Island somewhere MadMax style and let them figure things out... I hear the French have some lovely Islands they used to use for this...