Our office landlord was a cunt to me on several occasions, and ive done the following:

pissed in his coffee
got a dog (canine, not munter) to lick his supply of doughnuts and pastries
let the air out of his car tyres
left a congealled pint of milk 'hidden' in his office (and apparently, he still hasnt found it, despite the smell)

and various other things, like scratching my balls, then wiping my hand over his keyboard/desk

edit: ive doe a lot more things to many other people, i'll add em as i think of em
( lo, the Greebo Warrior - Est. 2002, Fri 14 May 2004, 1:10, Reply)