Not cool, but what do you expect from the uneducated and barbaric.
I have ten years of formal education after my honors degree in biology. My ornithology teacher was a nationally recognized expert.
I trap them, sterilize them, and then release. They keep the mouse/rat population in check. We have done over 5000 in the last year.
Mice and rats are needed to keep up a healthy population of hawks, owls, snakes, skunks, coons, bobcats and assorted other natural predators. Cats make no distinction between European rodents and the threatened species of deer footed mice, dunes mice te cetera.
Cats also eat a wide variety of insects, birds, lizards and assorted critters. So you're deliberately killing off the indigenous wildlife. Multiply 5000 by 100 in the north or 200 to 500 for the warmer climates to get an idea of the annual number of songbirds you have killed. 1/2 million by the most conservative estimate!!!
If I ever saw someone shooting cats I would inconspicuously make note of their Lic#, address, description for future use. Would it be worth it?
Yes it would be worth it. At your slander hearing I would be happy to produce color slides, graphs and charts which might help your victim obtain a large jury settlement.
On a more sarcastic note, one of my wife's friends is a "cat rescuer". One day she caught a mouse in a glue trap and she was overwhelmed by the little critter's suffering. So what did she do? She considered all her options and her feeble mind could come up with only one option. She BURIED it alive! Admittedly that may have been more humane than being eaten alive by a cat.
So! What is your favorite caliber to use to humanely remove feral cats from the food chain? I prefer the .17 due to its excellent stoppng power and its tendancy to risk less collateral damge to objects which are significantly behind the cat.