You always hear or read about mistake business people and pr people make. For example, the one pr person that sent a semi-racist joke out to a list of his friends, but accidently sent it to his media list. Well this is about as bad, if not worse. I'm not sure how much this will affect the reputation of the PR professional, but I'm sure it can't help.

Microsoft Sends Secret Dossier on Reporter, to Reporter
http://blog.wired.com/business/2007/03/enough_about_me.html