Wankers.
When confronted with unwanted cats in our yard I get out the .22, do a little target practice, and then hang the carcass on a fence because the crows have to eat, too.
Problem solved.

What’s that old saying? ....................”you can pick your nose but you can’t pick your neighbors.
From Wiki:
Territoriality is a term associated with nonverbal communication that refers to how people use space to communicate ownership/occupancy of areas and possession The anthropological concept branches from the observations of animal ownership behaviors. We can consider that this personal space is like a bubble that one doesn’t want invaded................lest we throw cat poop on ‘em.
His cat, his poop. What’s wrong with returning his property to him?
“Lucas said he was concerned his 5-year-old daughter could have touched the cat droppings and suffered ill effects.
My children learned at about age 1 1/2 not to touch poop.
Manners learned in a zoo cage in Oregon.
http://www.youtube.com/watch?v=UXHwIrEpeSQ&feature=player_detailpage#t=58

How do we know they weren’t throwing food?
I mean, after all, it is Great Britain.
I had some eighbors whose children would poop in the yard because their Mom would lock them out all day so her house would stay clean..
Then the kids would lob it over the fence into my backyard so their Mom wouldn’t know they pooped in the yard (encopresis?)..
Other than that, and the husband beating the crap out of his wife, and coming over to borrow orange extract, vanilla extract, or cooking sherry when he ran out of booze, they were okay neighbors.
OOps, eighbors =Neighbors
“I know it was their cat....I DNA’d it, found a—hole prints and saw the little muggy filing his claws at my sidewalk, I did, I did.