Robert Frost said “Good fences make good neighbors”.
Lawyers add, provided the fence is on the boundary line.
Fences are often intended to mark property lines. If people see a fence they may rightfully assume it marks a property line. If asked, lawyers will tell a property owner to place fences so the outside edge is on the boundary line or an inch or two inside the boundary. Lawyers will often recommend they hire a land surveyor to place stake on the property line so the fence is located properly.