I can’t wait for the comments on this. Basically, it will be derisively dismissive.
Seems to be a case of overstepping boundaries to “protect” the owners. No sign will protect an owner from a lawsuit. Hell, when I lived in snow country, the city mandated that you shovel your walks in front of your house. Sounds good until you find out that an un-shoveled walk is an act of God, thereby beyond human responsibility, and a shoveled walk is a lawsuit in-waiting. Once you modify nature, you are responsible for any damages - even if you did the modification under penalty of law.