No-kill shelters: worse for animals?

I think that this news makes it official: everything sucks. MSNBC had an article today that talked about the possibility of no-kill shetlers actually being worse for the animals in them than would be the normal (or "kill shetlers" as I like to call them, starting right now) shelters. Go here to read the article.
The basic problem is that no-kill shelters do not euthanize any of their animals; however, if they continue taking animals they quickly fill up. In some cases they just keep adding more animals until they are overfull, overcrowded, and the animals are living in unhealthy conditions. Can you believe that there are 6-8 million dogs and cats sent to shelters in the US every year? That's ridiculous. If only people would pay attention, they would come to the conclusion that there is a solution whereby we don't have to continue killing defenseless animals:
Get your pets spayed and neutered; if you do not do this, you should not be allowed to have a pet.
Don't buy dogs out of puppy mills; that dog you have could have been a stray that you spared from death.
Better yet, don't buy dogs from breeders at all; would you love your dog less if you didn't know its background?

As the supposedly dominant species on earth it would be nice if we could make an effort to be better stewards of everything.