MPN, we once awarded a very useful but potentially arguably punishment which ended with 3 week's nights for the miscreant.
He, a rather large lad, had engaged with a diminutive MT driver. The latter was given a period of detention thus depriving MT of a driver and increasing the workload on the others. Our man was awarded forfeit of pay - about one month's worth.
As he was now distinctly short of cash it was suggesting that he might like to volunteer for the night shift for 3 weeks of a paper exercise. He did a good job, subsequently worked for Pitchfork and got an exceptional report and last i saw, a few years later, a big grin and cpls tapes.