I actually support this council initiative (very rare for me).
As mentioned above,sadly,a few spoil it for the rest.
Some (irresponsible) folk appear to think that it is perfectly acceptable to leave dogs... where other folk can stand in it (footpaths) or worse in places that children could potentially get it on their hands while playing (parks).
I seen folk actually picking up other folks dog mess up
...
....not something I'd be over keen on doing myself although it has been known for me to pick other folks rubbish/litter up when I go on my wanders.