Since my next door neighbors have not neutered their male cat, we suffer a huge ferral cat population in my neighborhood.
I have been cage trapping them and calling the city animal control to pick them up.
Irresponsible cat owners are to blame for this mess.
Neutering male cats has virtually no effect on the feral cat population. It’s something that sane people do because it cuts down on violent catfights, and late-night-yowling, and makes it safe to let the cats in the house by eliminating the horrid scent in unfixed male cat pee. But the population is driven by the unspayed females. If there’s one unneutered male in several square miles, then every single unspayed female will be pregnant virtually all the time except when she still nursing young kittens. Cost-effective population control among ferals and free-roaming owned cats needs to focus on getting every single female spayed.