@cstross I can't think how to search for it now, but I remember reading a while back someone went to a convention wearing makeup designed to defeat autofocus algorithms, and watched people frowning as they tried to take photos of it.
CV Dazzle is a computer vision camouflage strategy developed in 2010. Unlike disruptive-pattern material, CV Dazzle is bright and bold, and evades detection by breaking weaknesses in automated pattern recognition systems.