The mod mentioned on the other forum ( http://www.moneymakingexperts.org/f12/claim-google-authorship-your-forum-threads-497/ )gives you full control on what you are trying to claim which should be ok if you are only using it for the
correct type content you start.
Also it does't apply any authorship to the replies
If it was only used for IPcontent articles and the blog section, would that be ok? Or does google look at the site as a whole?