In a message dated 5/7/2009 6:05:30 A.M. Eastern Daylight Time, lear@cisco.com writes:
I'm curious as to whether all of this is really a problem.  Is anyone
aware of anyone NOT using the data because of a rights concern?  I don't
know how hard it is to get such statements put into code, but since the
U.S. government is involved, one could only imagine...

Eliot
Not to stir the pot but, this is where this started:
 
In a message dated 4/28/2009 6:01:27 P.M. Eastern Daylight Time, edwin@mavetju.org writes:
For all the years I have never worried about this, but today I got an email in
my mailbox asking me "Since this is vendor imported data, we would like to
register under which license this data is distributed.".
Cliff Hancuff