See this article in the
Business Spectator.
"Companies and individuals are increasingly beginning to query why they should simply wear slanderous online comments that they wouldn't hesitate to take legal action against if it appeared on the printed page. From the heady early days when the internet was seen as a beast too wild to be tamed by the law, there is growing debate as to whether and how the web should be regulated.
In the past few weeks, we have seen a series of legal issues arise in relation to comments on the internet – particularly on Facebook.
In one case, $30,000 in damages was rewarded in response to defamatory comments by a man using various pseudonyms on a stock market forum. We have also seen an Indonesian man currently face jail time for insulting his music mentor on Facebook. ..."
See also - Facebook Ads article