enough is enough

two different men walking their pitt bulls and not cleaning up after them. one is a tall black man with short hair cut and short beard with a white pitt bull with tan spots and the other man kind OF short black male walking two pitt bulls . they both let their dogs pass the bowels on side walks in front of people's houses and never ever cleans it up. they never have bags to clean up after the dogs.. HELP HELP STOP THIS !!!