spam relaying by the big boys

Earlier, Myk O'Leary said:

Earlier, Jon Lewis said:
>
> ----- The following addresses had permanent fatal errors -----
> <abuse@uu.net>
>
> ----- Transcript of session follows -----
> ... while talking to mail.uu.net.:
> >>> RCPT To:<abuse@uu.net>
> <<< 550 <abuse@uu.net>... User unknown
> 550 <abuse@uu.net>... User unknown

Connected to mail.uu.net.
Escape character is '^]'.
220 relay1.UU.NET ESMTP
vrfy fsdf
550 fsdf... User unknown
vrfy abuse
250 <abuse@relay1.UU.NET>
quit
221 relay1.UU.NET closing connection
--

So the PR department got the word out before the sysadmins got the mailbox
created? So which department is overloaded?