can't get a prescriptive easement in California unless the access is "hostile to the true owner." And posting a sign wipes out that hostility, per Civ. Code sec

can't get a prescriptive easement in California unless the access is "hostile to the true owner." And posting a sign wipes out that hostility, per Civ. Code section 1008: No use by any person or persons, no matter how long continued, of any land, shall ever ripen into an easement by prescription, if the owner of such property posts at each entrance to the property or at intervals of not more than 200 feet along the boundary a sign reading substantially as follows: “Right to pass by permission, and subject to control, of owner: Section 1008, Civil Code.”