Why would you think there would be?
Herein lies the problem: In the wonderful age of internet and computers, people start reading. Invariably they read something about somewhere, somehow, someone got hassled. So the natural instinct is to think "aha, I wonder if there rules in MY area?" So they start asking around in areas that no one really ever cared or thought about it, UNTIL they started asking. I say .... just go (barring obvious historical monuments, posted, etc...). If someone has an issue, they're welcome to tell you.