Thanks again to Diana for sending me these photos.
Behind the Praca da Autonomia there are the excavations of the old port area. In the Rua 31 Janeiro there is a major bus stop overlooking the area. There are also always lots of tourists looking at them, as well as this, disgusting mess of cigarette ends. Thus sign is there to issue a fine, I just wonder how many fines the Camara of Funchal have given out.