You simply wouldn't get away with that if I was your nieghbor, but then, my disposition allows me the freedom to own property where there aren't any. Let me know where you live, I'll by the house next door and rent it out. :o)
Out here, a few cows might get away and go poo on your grass and stomp some nise whole in it, but there wouldn't be anything you could do about it. Try shoot it and I'll make you eat the whole thing raw.
What do you have against well kept lawns?