pg_shadow dump annoying problem

Hi all,
doing a postgres dump I a couple of time in an
annoying problem:

# pg_dumpall -g > pg_user.sql
# head -n 12 pg_user.sql
--
-- PostgreSQL database cluster dump
--

\connect "template1"

--
-- Users
--

DELETE FROM pg_shadow WHERE usesysid <> (SELECT datdba FROM pg_database
WHERE datname = 'template0');

Now if the file pg_user.sql is used accidentally by a user that is not
postgres the result is that all users are deleted ( also the user that
is doing the restore ) and no other user is created.

May be the "DELETE" phase shall be:

DELETE FROM pg_shadow WHERE usesysid <> (SELECT datdba FROM pg_database
WHERE datname = 'template0') AND usename <> current_user;

am I miss something ?

Regards
Gaetano Mendola