Facebook blocks and bans users for sharing Guardian article showing Aboriginal men in chains

Social media site incorrectly removed historical photo on grounds of nudity, then for three days blocked and even banned users who posted link to article

Facebook has blocked and in some cases banned users who tried to share a Guardian article about the site incorrectly blocking an image of Aboriginal men in chains.

On Saturday, Guardian Australia reported that Facebook had apologised for incorrectly preventing an Australian user from sharing the photo from the 1890s.