Cheesed
I got back to work today after vacation to find my desk had been cheesed. They were on my computer, on the sun lamp, on my trash can, covering up the laser on the bottom of my mouse...everywhere. It was pretty awesome. This is my favorite, on my Oatmeal poster:

In other news, I took about 20 pictures trying to catch this guy:

That's the best of the bunch, though it's still not very satisfying. Wily little buggers.