I do not think that the GR said that Debian should try to guess the
licensor's meaning when determining *distributability*. That seems even
more dangerous. Doing so when interpreting the DFSG simply opens up
Debian's users to liability if they ASSume that a package in main is free.
But doing so when determining distributability opens up Debian to direct,
primary liability.
If that's what the developers meant, they should have said so.
I'm sorry I didn't notice this earlier, before the GRs; the "hmm, wait,
isn't ftpmaster download access restricted?" moment didn't come into my
head until today.