As a result, a lot of the prisoners become psychotic and when they are let out - or before - they hit or stab someone and people say: "There's those naughty criminals at it again."
The human mind can't take that treatment for that length of time. They're not getting sunlight or clean sheets. They're often in the same clothes for months.
Some have access to the library, but others would be illiterate.
The philosophy of D Block is to take away all privileges so prisoners have to earn them back, one at a time.
People might think it's namby pamby to worry about things like this but it's all part of treating people humanely. If you don't, what are you releasing back into the community at the end of their sentences?
It's contrary to United Nations rules relating to prisoners and it's awful. I don't know how New Zealand can tolerate it.
- extract from Grumpy Old Men
• Peter Williams is a prisoners' rights lawyer