Social Tagging at the Philadelphia Museum of Art

No kidding, The Philadelphia Museum of Art is allowing users to tag the images in the online collection. I have always thought of the term "tagging" as having a double entendre implying both adding a bit of information (ie a price tag) and a scribble of graffitti, so I'm curious to see what unusual and irreverent tags are created (I already see one Duchamp is tagged "naked woman" although you can't see her in the online image).