i was raised a "good ole boy" in the south, and in town, you respected another mans property (be it his home, car or woman) - lest, you get just what you suggest - a shotgun pointed in your direction.
it was a polite respectful community.
"an armed society is a polite society".
having said that, and having lived in St Augustine in the 80's (before the dark times, before the - developers)....you need to post a picture of the area in question.
before you can even do anything - do you have a legal right to the property in question ? (ie. can you claim control over it) if not, then it's a moot issue.
like complaining a pimp is parking their car of business in front of your row house in NYC.