(Answer: no, no, no, no, No!)
From the article (about feral cats in California):
At that rate, it is clear we soon will not have enough ground to stand on: (400,000 x 6,000,000).
While most states are stricter in their regulations regarding feral cats, case law in California legitimizes feral cat colonies. These colonies are established or tended by well meaning "caretakers" who believe that cats have a right to live in nature. They are fed and watered daily by the these caretakers. In some parts of the state -- Sonoma County for example -- colony densities approach three to five colonies per square mile and may have 20 or more feline members.
Realizing that one pair of cats, having two litters of five kittens per year, can exponentially produce over 400,000 cats in a lifetime, can we begin to understand the problem. And it is a worldwide problem. A recent study in Australia found more than 12 million feral cats in the country; feline experts in the U.S. peg the number of feral cats here at 70 million.
But then again, maybe there's a reason I am not a demographer.