Screwing with your co-worker's cubicles help pass the time. These pranks are safe to pull and should not get you fired. Lets start with a basic cubicle prank. Just use plastic or paper to completely wrap the cubicle up.
If you want to take it one step further you can wet the paper down with glue and water. Take your time and make a huge paper mache desk. If you are talented enough you can cut the desk out and remove it. The victim will think their desk is just wrapped with paper. They will be shocked to find out it is only a paper shell.
Free Revenge Ideas Upgrades
EVIL PRANK BONUS
Build a cubicle robot out of office boxes. Have some fun and make a huge robot or and Easter Island one.
GETTING EVEN BONUS
Get a bunch of packing peanuts and fill the cubicle completely full. This will a huge mess to clean up so try to remain anonymous. You will have to probably do this over a weekend when you can get the office to yourself for a while. If you want to be a big jerk put a bunch of the peanuts through the shredder first. shredded peanuts are almost impossible to pick up because they cling to the everything and get mashed into the carpet easily.
GETTING SERIOUS REVENGE BONUS
A fun cubicle prank is to lay little cups of water all over the the cubicle floor. You can use your imagination and fill the cups with other fluids if you really don't like your coworker. You can fill them with copier ink and water or glue mixed with water. Either of those will be impossible to clean up or will stain the victims feet and ankles. If you use enough cups it will make it impossible to get to their desk without knocking some of the cups over and spilling a bunch of fluid.