I never got into much trouble at school, but was often around watching over people get into trouble. There was one time I did get into trouble though...
There was a book that any student was late had to write in. You had to write your name, classes missed and the date and the reason you were late. Now for various reasons, I was in hospital a lot during Year 10 so was often late to class so I wrote in this book a lot (So much in fact, the receptionist learnt my first name and always said "The usual?") However, even though I wrote in the book, a letter was repeatidly sent home every time I was late, asking why I wasn't in for a certain period, even though I'd written in the book.
I became convinced they didn't even bother looking in the book so in the end just started writing rubbish excuses such as:
"Got mugged my Wombles"
"Fell backwards down a really big mudslide"
"Eating and drinking morning tea and scones excessively"
Of course the one week I decided to do this, the school has an inspection. A week later I get called into the office and questioned about my excuses. Didn't get punished...Infact the principal said I had a "Wild imagination" but gosh, was I worried for a while!
EDIT: I thought of one more actually. When we went into the IT suite, we had to sign in and out of a book to say we were there. Me and three friends headed in to use the computers. One of my friends, a bit of a "special" child, starts sending us Lolcatz photos. They were funny and there was a bit of laughterbut nothing major.
The IT head went ballistic, claiming we were totally unruly and kicked us out. However he told us to sign out names on the book before we went. We are all quite upset, when outside our "special" friend tells us not to worry. We ask him why, and when we'd walked in he'd signed our names as Donatello, Leonardo and the rest of the TMNT. We never got banned, and it turned out the TMNT were at our school that day.