
Rob Horning proffers a guess:
[T]he “alliance … between photography and tourism” is at the heart of what [Susan Sontag] called “the predatory side of photography.” We’re still hunter-gatherers, under this theory, bagging images like sustenance.
(Photo: from the project La Joconde by Mika Matsuzaki and Benjamin Mako Hill who took photos of people taking photos of the Mona Lisa.)