Somewhat.
If the owner wants the place back then can have it back legally unless it passes something like 27 years, in which case their property is handed over to the squatters (never happens obviously). I disagree with people spculating and buying up land that could be used when there is a huge housing shortage and increasing waiting lists for appropriate housing for people. I see no problem in people finding a place where they can be relatively safe and warm in comparison to the streets, when it's sitting right in front of their face. I don't agree with damaging property or anything accepted as completely immoral, although some here would like to pretend I do.