Also, you don't necessarily need a lot of predictions from a net to fool it, because (another surprising result) images that fool one net tend to fool others! S

Also, you don't necessarily need a lot of predictions from a net to fool it, because (another surprising result) images that fool one net tend to fool others! So I can create fooling images on my in-house net and then take them and fool your net-used-for-some-important-application without getting any feedback from your net. That's very surprising, and does raise serious security concerns.