Digital shoplifting

Riled Japanese book sellers have been waging a losing battle against "digital shoplifters" since cameraphone-owners in Japan have taken a liberal attitude when it comes to snapping pics of magazines and books. The Asahi Shimbun details some failing bookstore tactics, like warning posters and seals to stick over the camera lenses upon entry, while other venues such as public baths, fitness clubs, and museums are barring cameraphones outright. Since 60% of Japanese phones have cameras it's not surprising at all that this would be a problem, but really why don't they just come right out and say that the real cuplrits are cheapskate guys reading porno mags?