alt Hacker NewsCalifornia has a similar issue where all beaches are legally supposed to be public, but owners of beachfront properties often have different ideas...
https://nypost.com/2024/02/29/business/california-hoa-with-f...
https://www.theguardian.com/us-news/2015/oct/02/california-w...
https://www.hcn.org/articles/public-lands-a-battle-over-beac...
Taking a chainsaw to said fence on the request of a non-emergency request line would be perfectly legal. They are obstructing public space, no different from a pothole or an abandoned vehicle.