Just figured this would help out a bit and help the forum managers sleep a little easier.
https://www.eff.org/deeplinks/2012/...-excerpt-online-forum-non-infringing-fair-use
Judge Roger Hunts judgment confirms that an online forum is not liable for its users posts, even if it was not protected by the safe harbors of the Digital Millennium Copyright Acts notice and takedown provisions. The decision also clarifies that a common practice on the Internet excerpting a few sentences and linking to interesting articles elsewhere is a fair use, not an infringement of copyright.
https://www.eff.org/deeplinks/2012/...-excerpt-online-forum-non-infringing-fair-use