Around Amsterdam you’ll often see Graffitti in this format, with a quirky provoking slogan, and signed “Loesje”. You can also buy cards with some of the more popular slogans. I like the way this message has been folded in half, subverting the orignal meaning.
At first it was really confusing, there were too many signs in too many places for it to be just one person, some were in Dutch and some in English… but a Dutch friend linked to Loesje’s website where it’s explained as a “Together we form a writer’s collective, a NGO, a poster activist group, an international organisation, a creative network, a contagious idea”. It’s open for everyone to join.