Probably the only way is to apply for an ASBO for the irresponsible cat
> owners who let their pets roam and s*it in other peoples gardens. :(
TBF they have built something that looks just like a giant cat litter tray with pristine white litter, so it's not surprising the cats think it's an ideal place to poop. Pooping in the litter tray provided is them doing exactly what humans have trained them to do.
Theo