This paper explores folk-linguistic photo blogging as a specimen of twenty-first-century bottom-up prescriptivism. Via the undisguised or concealed language policing contained in such exhibits, folk-linguistic photo blogs add to the digital recording of the linguistic practices they concentrate on as nonstandard or unschooled. This process is closely investigated in a case study on emphatic quotation marks, a nonstandard punctuation form which has been labelled ‘greengrocer's quotes’, and its attendant folk-linguistic photo blog.