If a neighbour of yours who has been experiencing a dog shit problem on the path outside his home then confesses to breaking 2 glass beer bottles in an attempt to prevent it. The path is on a direct route through to the local amenities where kids are often play and young mums with their pets also walk. He knows which dog and owner is responsible for this problem.
I have two dogs myself, and know how much it costs to take them to the vets as a result of irresponsible humans actions. I am appalled at this behaviour where innocent people and pets could suffer as a result.