Why does Sprint have address filters again?

[Sean Donelan <SEAN () SDG DRA COM>]

For some unknown reason, although IHETS has been allocated the entire
traditional class B 165.138.0.0, they are announcing it as a partial
165.138.0.0/20.  They could announce the entire /16.  But they've chosen
not too.  If IHETS wants to ensure they can reach as much as the Internet
as possible, they could follow Sprint's filtering policy, and announce
their network as a 165.138.0.0/16.  IHET could check
http://www.sprint.net/filter.htm for a description of the policy.

Since IHETS seems to be a SPRINT customer, I sure would appreciate it
if the SPRINT NOC could explain to IHETS why such address filters exist,
and if Sprint thinks its a good idea to apply them to other ISPs, why
the reciprocal argument would also be true.
-- 
Sean Donelan, Data Research Associates, Inc, St. Louis, MO
  Affiliation given for identification not representation