You don't have to own it in order to occupy it. In some cases you can petition for ownership after occupying it for a certain number of years. I might be talking out of my a$s, but if you feel strongly about it, DO SOMETHING!! surf the web and search related items you might not have known about before. One way to "fix" things is by dropping out. It's a movement. There are also colonies of people, sometiems called co-ops, sustainable villages, or intentional communities, who have taken residence in places that were previously unoccupied. Try looking up some of these.. even if just for the sake of looking at it. I even signed up to get more info on joining one years ago, but lost interest somewhere along the way.
http://www.ic.org/
http://therabbitsholevillage.com/
https://www.cohousing.org/