I remember a number of years ago some Swedes who had vacation spots there, their houses were taken over by squatters and there was no legal way to get them evicted, according to Spanish law. Some hired criminal thugs to drive them out but that was obviously a bit risky. I think it was mostly Romanian gypsies who were the squatters then. A Swedish TV team went over there to film the residences and were threatened, the gypsies felt comfortable enough to start growing pot in the yard too while thrashing the interiors

Had the same problem at vacation homes here too as I recall, authorities did nothing.