boojababy, when it comes to where you can and can't dig, there are a few things to consider. Unless there are large signs saying you can't metal detect, assume you can but do it at low traffic times. Sunday early mornings are good.
Do your research...quietly! Look at park ordinances online, if going to a park that has no restrictions, print that list of ordinances and keep them ON your person when you detect. If any busy-bodies(besides police) approach you, show them the list and explain, in a polite manner, that there is nothing listed preventing metal detecting.
This worked for me when a city park maintenance guy ran me out of a park. I came back and he tried it again saying he will call the police. I whipped out the list and showed him the ordinance about how it was illegal for him to interfere with anyone using the park, and that it was also illegal for him to intimidate me and try to force me to leave. At that point he said, "we will see about that", and left. I never heard back from him.
If it is a policeman, treat him with respect and make sure you comply. Wait a few weeks and try again. Most cops that are trying to get you to stop, are usually there because some busy body ratted on you. I can't stress enough to be polite and understanding that the cop is just doing his job. IF, it is a cop with an attitude, then, if you are up to it, always ask for their supervisor. Don't get snippy back.
People will turn a blind eye in most cases.
Golden rule: If it is posted, then don't do it. Otherwise, assume it is fine.
