Not under control of any government on earth? It's not 2200 yet. Your entire colony will be dependent on earth for the rest of your lifetime. If we had evidence of nitrogen in martian soil and we had already sent machines that increase atmospheric pressure on the planet then you might be justified in thinking that it's just a matter of time. As it is right now you would have to live in an earth sponsored underground shelter and die in there. By defying earth you would just die sooner.