I have lived in cities big and small by orders of magnitude difference, and the park experience is the same. I'm sure gangs do what you describe in certain areas. But still I think what I am trying to get at is for the vast majority of people and things, we tend to operate pretty evenly. The rich and poor go to the beach and you can scarcely tell who is who when they are in polyester shorts sharing the same resources as everyone else. Are police maintaining this? Perhaps, but there are also beaches that don't have regular policing or active lifeguarding and they look generally the same in this regard as beaches that do. Maybe theres the threat of punishment if there would be something done but realistically the police don't work like they do in movies and TV and won't proactively respond before you get a black eye.
If people worked out how to be a bad person at a beach thats learned behavior. They might study the law. realize there are loopholes to exploit. Maybe realize they could argue the beach is private property and not public and kick everyone out. People do this, yes, but part of me imagines that they only attempt to do this because they know others have done similar things and are supported by lawyers and advisors who are finding ways to do this thing. Its not a natural response. Natural is probably a child working with other children they don't even know on a sand castle.
You are talking about the social norms I referred to. There is no natural response - those things are learned behaviors (that may be genetically influenced). Not all poor neighborhoods lack social norms, the ones that do have less available commons due to higher rates of violence and petty warlordism.
> But still I think what I am trying to get at is for the vast majority of people and things, we tend to operate pretty evenly.
When is the last time you saw a rich person take the bus? How many of them lobby for higher taxes on themselves to increase the availability and accessibility for regular people? It wasn't working class families hiring disabled "guides" to help them skip lines at Disneyland. There are plenty of ways that things are not operated evenly, even for things that are technically available to everyone.
If people worked out how to be a bad person at a beach thats learned behavior. They might study the law. realize there are loopholes to exploit. Maybe realize they could argue the beach is private property and not public and kick everyone out. People do this, yes, but part of me imagines that they only attempt to do this because they know others have done similar things and are supported by lawyers and advisors who are finding ways to do this thing. Its not a natural response. Natural is probably a child working with other children they don't even know on a sand castle.