Nice, JMH. An ad hominem attack and a sexual slur in your first sentence. 

Feral cats don't live in colonies unless they are being fed. They come for the food. So people who feed feral cats create colonies. And by feeding feral cats, you and others are obviously extending their lives and their adverse impact on human health and wildlife diversity. Several of your colonies have "aged out"? Does that mean you don't have any feral cats in your community any more? Of course not. I'll ask you like I've asked every other feral cat colony caretaker I've interacted with: show me evidence of TNR eliminating feral cats from a community. You can't do it because the whole point of the program is to allow people like you to hoard cats on someone else's property.