Passive-aggressive post-its

There's nothing quite like coming into work--after steeling yourself for a shift you didn't want anyway--and the first thing you find is a scathing note about how bad a job you did at work last night. Why is my workplace the Mecca of passive aggressive post it notes? It makes everyone edgy and insinuates an undercurrent of defensiveness into all of your interactions; is she the one that thinks I do a terrible job sweeping? Does he have a problem with the way I put out cupcakes? Why are these such huge issues? Why can't people stop and think about what night the person you are writing this note to was having and be a little compassionate? I am more and more feeling anxiety-ridden by this basic, boring job. I need a change. Preferably one that doesn't know about post-it notes.