Maybe take a cue from the Apple discussion forums (also run in Jive)?
The following notice appears in all forum pages and threads at the Apple discussion boards:
This site contains user submitted content, comments and opinions and is for informational purposes only. [Apple] disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the [Apple] Support Communities Terms of Use.
It may be worth considering inserting a similar caveat everywhere in these forums too.
Just another two cents.
