Speaking of tractors, why didn't they just get a backhoe to the quarry and dig out the road and turn it into a wall?
Yes, the walkers in the pit were making noise and drawing in other walkers; I would think you would want that... The pit in huge, and was nowhere near capacity.
I suppose that would be too easy, too permanent, and would screw up the storyline.
When Rick killed the pussy guy that got bit in the face, you could tell that Morgan and Michonne didn't exactly agree with it, but at the same time knew his screaming was causing a severe problem, and he was going to die anyway, so it needed to be done and they didn't say anything.