Removing a system user account

[Bob Hilliard <hilliard@debian.org>]

     dictd runs as user dictd if that user is available on the system,
and user nobody if it is not available.  It uses adduser to create
user dictd in the preinst.  Since version 1.5.5-7 it has used the
--no-create-home option to adduser.  

     Bug#138722 asks the dictd remove this user and the /home/dictd
directory when purged.

     It is possible, but very unlikely, that the sysadmin might have
created user dictd, with a home directory, himself.  Would it be
reasonable to remove this in the postrm?  Should it ask the admin's
permission, or are system users considered the property of the vendor?

Bob
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