I don't really agree with the original poster's sentiments, but carnivores tend to produce terrible fertilizer that isn't likely to benefit any city lawns.
Your comment sent me down a Google search asking the question, "Is cat poop good fertilizer?" Most advice seemed to agree with you, but I found a few interesting (if tangential to your point) stories.
The most interesting was this guy in China who made a custom composting system to process cat poop into fertilizer in order to fund his cat sanctuary.
