Maria Marshall, whose work incorporated her children and treated many of parents’ deepest fears, was somehow discovered by the guy who runs the #Pizzagate YouTube channel – so now she has a pack of conspiracy theorists convinced she’s involved with pedophilia. Philip Kennicott talks to Marshall about the real intentions behind her videos and looks at how they get misinterpreted: “Marshall’s art may have succeeded all too well, agitating an anonymous art-phobic audience in almost the same way they are meant to agitate their intended audience in the cosmopolitan art world.”