We didn't have pranks on newcommers at my office, only to people once they had been around a while. My coworkers (all terribly messy-desked engineers) quickly noticed my aversion to a cluttered workspace. If I encountered a bug in the code or got frustrated, I would start packing up the cardboard boxes, cleaning up the random components all over the desks / floor, etc. It didn't take long for them to start purposefully cluttering my desk when I was in a long meeting. I would leave with a spotless desk and come back to find a pile of components, office supplies, and literally whatever else was laying around. They really enjoyed watching me come back frustrated from another stupid meeting to find my space had been overtaken. Assholes. The best part was they would change my mood thingy (only the best thing ever) to be "postal" whenever they did.