That in turn has lent new urgency to an ongoing review of Australia's defamation laws, with the federal attorney general this week writing to state counterparts stressing the importance of tackling the issue.
"Social media has become a coward's palace where people can go on there, not say who they are, destroy people's lives, and say the most foul and offensive things to people, and do so with impunity," Morrison told reporters in Canberra.
"They should have to identify who they are, and the companies, if they're not going to say who they are, well, they're not a platform anymore, they're a publisher. You can expect us to be leaning further into this," he added.