I don't think the parallel to be drawn here is against physically squatting in property the occupants do not own, but with people who buy property and use it as a value sink; as seen with a sizable portion of non-domestically owned property investment in London, Vancouver and other high value regions.
Such property can be seen to sit unused by anyone, but it's lack of availability (when it could otherwise be used) contributes to the scarcity of property in that district, and thus inflation of property prices in that area (be it naturally occurring or otherwise)
Such property can be seen to sit unused by anyone, but it's lack of availability (when it could otherwise be used) contributes to the scarcity of property in that district, and thus inflation of property prices in that area (be it naturally occurring or otherwise)