Best way to promote cat ownership, ever!
Our cat used to dump in the woodchip round my son’s swing/slide thingy. I got a load of black pepper and liberally doused the whole area, she moved on to some sucker’s garden a few doors down.
A lot of people making this sort of statement seem to forget, population density is key to ecology.
But anyway, the idea that cats, which have been in Britain for two millennia, have any significant effect on the general ecology when compared to the damage wrought by road traffic and farmers and humanity in general is frankly ridiculous.
Also: No humans = No domestic cat.
Humans are just as responsible for wildlife death by cat predation as they are for the other things mentioned.