The Marauders were the biggest troublemakers of their time. These are a few of the lines I think they would have had to write out.
S: I will not, after every potions lesson ask if the potion is a suitable sexual lubricant.
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J: I will not use the invisibility cloak to spy in the girls bathroom
S: I will not attempt to bribe James into letting me spy with him
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R: I will not slip veritaserum into the first year Slytherins pumpkin juice
J: I will not proceed to ask them for the password to the Slytherin common rooms
S: I will not then paint whole of the Slytherin common rooms in red and gold.
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S: I will not send howlers of a sexual nature to unsuspecting pupils.
J: I will not send howlers to Sirius for doing such.
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S: I will not use 'Engorgio' on any part of the body
J: I will not inform any female pupils of this development.
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R: I will not supply peeves with dung bombs
J: I will not give peeves the slytherin common room password
S: I will not pay peeves an extra dung bomb for a repayment of hitting a certain student in the head. 'Snape'
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J: I will not steal PROF. Dumbledores Deluminator and use it to substitute for instant darkness powder
S: I will not steal all of the clothes in the laundry
R: I will not tie-dye prof. Slughorns robes. Not matter how much i think it suits him.