I like to post a lot about what we do as PR professionals and how it should all work, but this is a great blog post from Getting Ink about what not to do! Cover your eyes, it’s scary! http://gettingink.typepad.com/getting_ink/2009/11/just-wrong-on-every-level.html.
I have made mistakes with journalists (at least one I can recall), but going after them because you did not like how the story turned out is not acceptable!