Property rights are weird. For example, if you have a beach house, and people walk along the fence or through your driveway to get to the beach, it may be considered 'common right of way' or something like that, and the property owner has no recourse. Same for personal property that abuts parklands.
I have never knowingly gone onto someone else's land (w/o permission), but I have been deep in the woods and been the recipient of a "get off my property!" scream. I am in the middle of the woods...how the eff would I know whose property it is?? But I just shrugged, apologized, and made my way.