Street Art to Think About: Graffiti as Advertising for Graffiti Removal Service. Sometimes art is supposed to provoke. That was the goal of this graffiti, which I sprayed with a stencil. The thought behind it? I wanted to make people smile and raise a few new questions. And it should be a bit cheeky, too. That’s why I came up with the idea to spray graffiti for our imaginary “Graffiti Removal Emergency Service” fake guerrilla advertising campaign. Pretty absurd, isn’t it?