That's how we do it in most cities in WI. Except the city gives you a written warning by mail. If you don't do it, they just charge you some flat fee to have a city worker do it. It's expensive, but nowhere near that ludicrous.
Or... just ignore it? It's grass, not toxic waste.
Even better, subsidize it; it's valuable habitat for all kinds of species threatened by human activity.
That makes so much sense. Which is how I know they'll never implement anything like that :(