Over the year’s, Improv Everywhere has been responsible for a wide variety of public pranks and creative projects, from flash mobs that freaked out Best Buy to Star Wars guerilla theater on the subway. “The large majority of our projects have been unauthorized, unpermitted and unannounced. I think the public should be allowed to use public spaces as stages to express themselves creatively. If our sidewalks and subway platforms can be covered with advertising, they should also be acceptable venues for harmless creativity.”
Retail spaces are about as public as city plazas these days as far as Occupy is concerned: you can be there for a while, and then they will kick you out.