It is well known that I do not believe any software is
anyone's property. However, for the GNU project, I decided
it was necessary to obey the law. I have refused to look
at code I did not have permission to distribute.
About 5% of GNU Emacs is close to (though quite a bit
changed from) an old version of Gosling Emacs. I am
distributing it for Fen Labalme, who received permission
from Gosling to distribute it. It is therefore legal for me
to do so. To be scrupulously legal, I put statements at the
front of the files concerned, describing this situation.
I don't see anything I should warn people about--except that
Zimmerman is going to try to browbeat them.