Because you never heard of it does not mean they don't exist,
here's what I am referring to, personally, I do not retrieve my ball from a residents property.
Florida Property Law and Golfers
Under Florida property and real estate laws, golf course communities almost always have a section in their deed restrictions, easements, and covenants that allow golfers to retrieve their errant balls on residents’ properties. A section might read something like: "Every Lot and the Common Area is burdened with an easement permitting golf balls hit from the Club facilities to unintentionally come upon the Lot and for golfers at reasonable times and in a reasonable manner to come upon the exterior portions of the Lot to retrieve errant golf balls." It sounds complicated, but it gives golfers a legal opportunity to find and recover their errant shots, when reasonable to do so. If your Lot is fenced or walled, property documents generally require that golfers ask your permission before entry.
In short, it is likely that a golfer may enter your property to retrieve items such as golf balls (or pets) if they do so in a reasonable manner. Tearing down your fence would obviously not be considered reasonable. If your own property located on or adjacent to a golf course, you should become familiar with the applicable sections of any deed restrictions, easements, and/or covenants that apply to your property.
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Golf Ball Hazards In Florida: Legal Overview - FindLaw