My Dad told me of one he pulled at school, he and a mate stacked all the chairs in the assembly hall up on a stage in a manner that they all leant on one stack of chairs, which he then attached by string to the door leading into the room. Then he and his mate went up into the rafters above the hall and waited. Eventually someone would open the door, and the entire load of chairs would come cascading down off the stage.
As for myself, I've not done many, but I did once create a series of folders within folders on one of the school computers, with the top one named something like 'Killer Virus 2000' or something like that. The next day I go into the library and find the computer shut down with a note on it saying 'This computer has been infected with a virus'
Then at college I renamed icons on the desktop, I called Internet Explorer 'Bob', Publisher became 'Pub Crawler' or 'Down the Pub' and so on, well, someone in the IT department must have cottoned onto the theme because one day every single internet explorer icon on every networked computer was renamed to 'Fred', and I didn't do it!
I've also been
almost caught out at work by the old 'cling film over toilet seat' trick.
