I agree with much of what you said, but I don’t think they’re arguing in bad faith at all.
But I do think it's bad faith, because I doubt burrows picks the same kind of pointless argument about semantics when someone offers him a free sample at Costco, or a free beer, or is confused when reading the Washington Post online, even though it says 'Post' right there in the name, and that the printed New York Times doesn't really tell you the time, and that Fox News is not about foxes at all (even though it absolutely should be).
Because we're on HN:
There's 'free' as in beer ...
And there's 'free' as in 'freedom'.
[edit] Also, I cannot really see how anyone, not even burrows, would confuse 'free' treatment with 'free as in speech'.