That just sounds like passive aggressively leaving angry postits on the fridge. If you're being obnoxiously loud and keeping me from working, I will assertively

That just sounds like passive aggressively leaving angry postits on the fridge. If you're being obnoxiously loud and keeping me from working, I will assertively tell you to keep it down (or aggressively, if you're the annoying salesperson who spends most of his time making loud, personal calls). Good office design certainly helps with noise, but some people are simply obnoxious without realising it. Educating them can be helpful.