Often sentances would be more acceptable IF we didn't know that at most they serve half with good behaviour, and more often are out on take in 1/3 of the time.

Personally i think a sentance should be served in FULL and if you dont behave inside the sentence goes up.

Vai knowledge of someone close to me, good behaviour is RUBBISH, couldn't have been less well behaved, yet was out on tag in 5 months of an 18 month sentance?