Australian Politics

I have no doubt that either this campaign, or similar ones, could be manufactured by foreign actors. The article links to this prior incident: https://www.sbs.com.au/news/article/iranian-state-media-australian-fuel-reserves-claim/zm35615a7

And that can make legal action against the creator difficult. So what can be done about it? To what degree is the social media platform responsible (as much as I despise them, I think their responsibility is limited, but they do provide a platform which enables this) and to what degree are people reposting it responsible? Is it arrogant or ignorant for me to suggest small fines for people spreading outright defamation like this, to solidify some actual accountability in social networks and hopefully make people more analytical about political propaganda? If our system can only prosecute the original creator, then they can just hide behind anonymity, jurisdiction or simply cop a fine as the cost of doing business.