Actually, in many places in Spain people frown upon you if you walk on the grass. They put signs on the grass saying: Stay off the grass!.
Some people do that here. The people that spend day and night to make their yards look good. It's funny that some people water their grass just to cut it later.
When I was on USA military active duty it was a crime to walk on the grass -- a guy (or gal) could be punished for it by having to clean up a square mile or so of trash that's on the roads/grass. And to this day (30 years later) I don't walk on people's grass, nor do I permit kids and other people to walk on mine.