It's a problem in offices around the world. You spend the morning grueling away at your desk imagining that tasty, delicious lunch you put in the shared refrigerator.
The time comes for you to partake of that meal prepared the night before and... it's gone. Someone stole your lunch. The realization hits you like a ton of bricks.
From that point on, you have two choices:
Get mad
Get even
Okay, three choices, because you could be like this guy and decide to get really, really passive aggressive with your shadowy note-writing ...