A friend of mine started a new job and unfortunately (fortunately?) has a Michigan State fan sitting right next to him. There's a prominent Michigan State flag featured in this individual's workspace. It's even more blatant because the job is not located in Michigan. Any ideas for how to silently troll this person? It being a new job and all, my friend doesn't want to be obvious that it's him. I suggested three and nine but that's a little hard to do without this person knowing. Much appreciated!