Comment by thedevilslawyer

Ok, let's talk specifics. Which of these will deprive your liberty:

        The freedom to run the program as you wish, for any purpose (freedom 0).
        The freedom to study how the program works, and change it to make it do what you wish (freedom 1). Access to the source code is a precondition for this.
        The freedom to redistribute copies so you can help others (freedom 2).
        The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this.