This recent stencil, discovered on a Mission sidewalk in San Francisco, represents one more manifestation of contemporary life that I probably do not understand. It seems to offer evidence for the existence of at least a few bright young artist-type stencil-spraying Mission hipsters who are hostile to expensive hand-held electronic gadgetry. Yet I see them in their hundreds every day blithely inhabiting the neighborhood and I never see a single one who is not glued to an iPhone. Maybe the hostile ones only come out at night, after I am asleep, to spray their iconoclastic visual messages.