Sorry, that was sarcasm. Based on the comments in the article and all the comments by the cat fanatics here at free republic.
Any time you attempt to put forward a solution that deals with the problem (feral cats, not house cats, that destroy an ecosystem they shouldn't be in) - the people that dare suggest pest control are labeled as psychos and murderers and whatever. Nary a mention is made of the irresponsible pet owners who either abandon their unwanted pets or have their 'outside cat' get outside their property and then go feral.
Housecats are a threat to the environment whether or not they belong to responsible owners (I saw a documentary about a study conducted in England fifteen years ago that demonstrated this convincingly; the average indoor/outdoor housecat has a dramatic effect on local wild bird/rodent populations). If you genuinely fear for the ecosystem you would do well to advocate the end of pet ownership(as PETA and other such organizations do). Somehow I doubt that's your agenda.
In any event, responsible folk who find truly feral cats ought to take them to a shelter where they can be treated and put up for adoption and then put down humanely if those efforts are unsuccessful. Allowing people to shoot any stray cat who wanders through their yard is plainly wicked.