Honestly, after hearing his rants for years, I'm of the opinion that his language is far more extreme than his opinions. If you don't believe me, listen to some political talk shows. Not Glenn Beck, but the more mainstream ones. They're saying much more extreme things (when you think about them), but sounding much more rational than him.
Really, if he talked like a sane, reasonable, rational person, he could make the same arguments and persuade more people. Right now, his extremism is making his supporters sound bad. He's a liability to his own cause.
His filtering of technology is less extreme a change in lifestyle than veganism. But you can talk to most vegans and completely understand why they're doing what they're doing, and sympathize with their decisions far easier than this. The first, last, and only Stallman speech I went to gave me a real headache at the --- lets be honest -- Jackassitude of his entire presentation. I was on his side until I heard him speak!