The first Google hacking* was done not much after Google introduced image search. For a while (maybe even still?) it was a popular pastime on for example on reddit ("write xxx in the comment to make this image show up as first" etc).
*or whatever it is called, when you spam an image with some specific keywords to show up first on google for those terms
*or whatever it is called, when you spam an image with some specific keywords to show up first on google for those terms