If the users don't control the program, the program controls the users. With proprietary software, there is always some entity, the "owner" of the program, that controls the program and through it, exercises power over its users. A nonfree program is a yoke, an instrument of unjust power.
Richard StallmanBy the way, I hope you all know about the worldwide boycott of Coca Cola company for things like murdering union organizers in Colombia. See the site killercoke.org.
Richard Stallman