What a shame! Sometimes artists leave cans (not empty) at the foot of their mural to allow the youngest to practice at a lower cost ... but on your photos it's not at all this. Thanks for sharing these pics and this problem on The StreetArt Community.
Please Please, also today I was on the road and have almost all murals photographed which also have a background why have been made in this place. So again what Posetives in this scene