Are there any really subtle performance artists?

If not, I'll volunteer. Like a guy who just loads a truck all day in front of a building with boxes with nothing in particular in it, then unloads it, then loads it again. Only the most attentive people would notice. Or a guy with bunny slippers asking for directions downtown? A man staring at a wall all day on the sidewalk of a busy city street? These kinds of subtle "eccentricities", if you will, would have an artistic point. You just have to be patient, and let the answer arrive on silent wings.