An important update for Australian businesses today, the Australian Advertising Standards Bureau has announced that Facebook pages are a form of advertising. As such comments on the page made by the page admin or a fan of the page must adhere to advertising standards.
Basically this means any comments that are negative towards your brand or that of other businesses must be removed immediately by page admins. Read more here: https://www.news.com.au/technology/brands-forced-to-get-facebook-trolls-under-control/story-e6frfro0-1226445048186