When we talk about feces we have to remember that we're talking about a lot of different pathogen and waste products combined together. It's not just e coli, but a host of things from bacteria and viruses to parasites and toxins. Feces are also fed upon by many other bacteria and fungus once excreted. Many of these things are species specific, so just passing from one animal to another may kill it or render it harmless. However, this is not the case for ALL potential pathogens. Some cross the species barriers just fine and then of
course people get sick ( bird flu, swine flu etc.) This problem becomes even more acute when you introduce human feces into the system as you more likely to make other humans sick with your pathogens.
I think we all realize that we eat some critter poo from time to time. A little bug poo on some fruit or a small drop of bird poo deep in the crevice of a kale leave. Sure, this happens. And people almost never get sick from it. But I don't think any of us would be ok with eating anything with our neighbor's fresh feces on it if we were knowingly doing so.
Of course I realize that most of these pathogen outbreak issues are related to large
feed lot and egg producers who mismanage and abuse animals. I understand that. But there are cases of people becoming sick from their own backyard animals. And in most cases it's due to sanitation issues. These cases are almost never reported, so we rarely hear about them.
Simply being a small backyard farmer, doesn't eliminate your risk for illness. Especially when you are introducing fresh human waste into an area from which you, yourself are going to eat from. Perhaps the eggs from that chicken would be ok. But what about the greens or tomatoes that were spattered with your "deposit" when the chickens scratched it apart? Once you release those pathogens into your environment, they can remain for a long time. They get in
water supplies, feed sacks,
mice and other critters carry it back into your house and to your neighbors. These are the reasons why we have sanitation practices. It's not a matter of IF it will happen, it's a matter of WHEN and HOW BAD.
I'm all for processing waste on-site and I commend the thought and consideration of those who do. However, doing so in a safe and sanitary way is surely better for all those involved. Animals, people, and soil.
Sorry if that was too much of a rant. I just want everyone to be safe so that communities like this can thrive.
As a general rule of thumb: Don't Eat Your Poop.