One perspective would say "RMS/Free-software advocates are saying only free games should be played" -- but another is:

"If we want to have access to the code for the games we play (as a value), what economic, legal and technical infrastructure (rather than depending on current copyright, DRM, etc) do we need?" If that's something we want, how do we advocate for it?

True. I'm not saying he can control the impact of his viewpoint, I'm making an observation on what that impact may be.

>and there is much room for debate on whether or not they're extremist.

Also true. I classify RMS as an extremist, but recognize that reasonable people may disagree.

>Some viewpoints can be logically categorized as being at the end of a defined spectrum

That is pretty much the definition of extremism, being at the final end point on either end of a spectrum. But then that's why I don't gravitate towards viewpoints that exist only as a single point on a spectrum. I prefer a multi axial approach that takes various considerations into account. Unfortunately for me that often makes it significantly harder to convey a short answer on my views, because they are fairly nuanced.

As far as RMS, he may have planted a very good seed, but I don't think that OSS would have gained dominance in many areas if there had not been more moderate & practical people working in the area.