Recently the Advertising Standards Bureau made a ruling that any business page on Facebook was not social networking, but rather, advertising, and thus the laws related to Advertising in Australia, apply to your facebook business page as well.

Under these laws YOU are responsible for the content on your page, even if posted by someone who visits your page. So if someone visits your page and posts something that is false, misleading, slanderous etc, then YOU could be held responsible. So it might be worthwhile checking out what advertising standards you must uphold and doing a review of how you operate your facebook business page.