>>3506341It wasn't even the worst thing I did.
Once I slipped into the classroom area early, before the teachers turned up, and crimped all the USB plugs on all the teaching devices cables, year 8 through 12.
The teachers had to white board until it was fixed. They were very angry.
The search for the wrong doer was long and they ended up punishing us all.
Before I finished there I did it again.