Well, I live in what is called "the inner city." I am smack dab up against a freeway. I have an eight foot block fence around my back yard, and the chickens run free all day back there.
The yard is all bermuda grass, and the chickens crop it down pretty well. They won't eat the seed heads though.
So far we haven't had any problem with the neighbors. I can hear the rooster crow in the morning, but the noise of the freeway pretty much drowns him out for the rest of the neighborhood.
The only predators I have to deal with is an occassional stray dog and homeless people. However, everytime the barrio bird (police helicopter) goes over, the chickens run for cover. I guess they think it is a big hawk or something.
We are probably illegal, but so what? We are criminals, who cares.
Rufus