Jesse - you're so sweet. We are in a different situation. We live in a subdivision and our jackhole neighbor across the street has always let his cats run free. The big male prefers to spend the last 8 years hanging out in the flowerbeds in our backyard killing birds and launching sneak attack the kids and the dog. A couple of years ago a stray female came along and they have produced about 5 litters. Guess where they like to live? In everybody's yard but the owners. They are all feral and nasty. We spoke to our neighbor and they basically said they could give a crap about their cat - they only got it for the kids - and the kids are older and don't care anymore. He said they put scraps out for the cats and he would be more than happy to put some anti-freeze in with them.
The first summer a litter appeared a few of us got traps from the animal shelter and got most of them - but they are like rats - they are everywhere and they are aggressive. They get in our (and our neighbors) garages and one of the little dumbasses jumped on our nextdoor neighbors grill while he was grilling. It just pisses me off that people think it's okay to just let their cats roam free - but we take responsibilty with our dog and had him neutered and keep him in the house, fence or on leash.