When graffiti is not graffiti

When is graffiti not graffiti?  This is brilliant: It’s an advert on a pavement, which I can only guess is ‘environmentally friendly’ and hard for the local Council to moan about.  What they do is put a stencil down on a dirty pavement and jet wash clean only the bits they want as the words for people to read.  To remove the advert somebody has to just clean the rest of the pavement!  I like it.  This particular ad I discovered on a major road leading to Liverpool FC’s football ground.  It’s a route walked by thousands on match days, so good call whoever came up with the idea!