Technically yes but personal ownership is not the issue. The issue is owning a forest or waterfall or mine and robbing it of all its value. But even owning a factory and making money off the labor of workers is only justified because the employer was given the right to own the factory in the first place. But where does this right come from, who has the right to give anyone this right? Do you think a person has a right to claim a continent for his own or his monarch? Do you think a people have a right to say they own it, they can but the only way they can prove this is through killing anyone who challanges their right, as in war. But if they can do this why cannot a criminal do the same thing? Its precisely the same kind of behaviour.