I don't really think it is. I believe free software is natural. Saying free software is political is like saying freedom is political. How is being against oppression political? Wouldn't that just be considered natural, and the people saying it is a political stance be the ones oppressing trying to make it political?
Do you really need to define freedom? Mark Passio does a great job at explaining freedom and natural law. I'm not saying that people don't make it political, but I do believe there is just a natural state of existence and cooperation that doesn't involve made up systems. Once you want to start making rules that infringes on others natural rights is when things get political.