That's a different story - it's about how people have upset the balance of nature.
I was an animal control officer at one time in my life.
It is pet owners that upset the balance of nature. There is not a lot of realy good pet owners.
If a person does not want a cat, or a dog, then why is there one in their yard? Why are they blamed for not wanting to clean up after someone else's pet?
My wife has Hens and their chickens, who are allowed the use of the yard are preyed upon by domestic and feral cats as are our native lizard and bird populations.
Using a water gun is not a bad move, but cats are sneaky, if the owner is not looking after them, keeping them contained within their property they, they will be back all hours of the night.
Regards Tony