Even if you like the FSF stances (and I have no problem with that), I think it's hard to argue that their idea of "free" is really, truly free as Stallman likes to pontificate.
I shit you not. The man is that much of an asshole.
After years of stories about interactions just like the one you described, interviews, and countless mailing-list flame fests, this should be perfectly obvious to anyone.
Let anyone think I'm picking on Stallman because of personality differences, here's another: Theo de Raadt. He is most definitely an asshole - but at least he's consistent, focused, and not judgmental.