That kinda misses the point. Free-as-in-freedom software isn't uncopyrightable software as he describes it. The purpose of it is the provide a copyright/copyleft to allow all who use these program to have access to certain software freedoms. GNU.org goes into more deeply, but simply calling it open-source software misses the point. Open-source software does not necessarily mean the software is Free-as-in-freedom.
GNU, and by that I mean Richard Stallman, has a very strong view towards software that is not particularly conducive to anything. Unfortunately, I can't really endorse the GNU position. The Creative Commons - which has a more moderate approach, is a better model, in my opinion.