I think that to try to own knowledge, to try to
control whether people are allowed to use it,
or to try to stop other people from sharing it, is
sabotage. It is an activity that benefits the person
that does it at the cost of impoverishing all of
society. One person gains one dollar by destroying
two dollars' worth of wealth. I think a person with
a conscience wouldn't do that sort of thing except
perhaps if he would otherwise die.

        -- Richard M. Stallman