Who Would Steal 30 Bag Lunches?

Or 30,000 books? The Paris Library has just discovered that about 30,000 books are missing from its collection...17,000 of which have gone missing since the last inventory - in 1947 (when I read that, I thought the last inventory was going to be a LOT more recently than that).

I'm not sure what to say about this. It is sad, certainly, but I'm not really that surprised. We're looking at a loss of about 280 books a year on average (which does seem pretty high). But, its likely that they've updated their security systems as technology has advanced, so a lot of those books were probably taken quite some time ago. Don't libraries anticipate this kind of problem?