Respect the desk bubble

My cube-mates desk resembles something like this except you need to add more pistachio shells and soda bottle caps all over the place. Unfortunately, their mess has now started to overflow onto my desk and this irritates me very much. I try to keep my space organized and not messy, because you can't do that does not mean that you can leach off my clean desk. I almost want to do a Dwight Schrute and push their stuff back with a ruler and clearly define the boundary of their shit pile. I cannot comprehend how anyone can get work done with so much piled up crap in the way. The other day my cube-mate spilled coffee all over their desk and I just watched as they wiped down the mouse only and allowed the random piles of paper to sop up the rest of the puddle. It boggles my mind. Playing nicey nicey in the office is important but there are reasons that we all have our personal bubble and why it should not be invaded. In the office my bubble extends to the edges of my desk. Don't mess with my bubble people.