I'm pretty sure we're just going round in circles now. The point is that people disagree about everything, so anything you leave up to "common sense" will cause disagreement. Any you can't possibly define rules for everything either.
No, "common sense" is the default. And where that is not enough - you can have rules for most common cases, to settle any dispute. And if there are edge cases that frequently cause disturbance where no clear rules cover them - then those cases can be put into the rules. It is not that complicated.
Now assume the park contains a billion people, some of whom are explicitly interested in doing things you wish to disallow, and some are explicitly interested in annoying you. Both of these groups continually do antisocial things not defined by the rules, even as you add more.
Then then start a political party to defend the parks service for discriminating against them when you create rules seemingly targeted at their legitimate misbehavior.
That is the slight difference in between the 2 things. The difference in simple and complicated. Because the more people you have, yes, the more complicated it gets.
