I think de-platforming the worst grifters and purveyors of radicalizing conspiracy theories is a way to push back against the spread.
The problem I have with this is that this is a moving target by design. Once you get rid of today's "worst grifter", today's "second-worst grifter" becomes tomorrow's "worst grifter". Pretty soon, you're deplatforming people just because you disagree with them.
"Deplatforming" basically means "your ideas aren't welcome here". It's one thing for a private individual or group to exercise their freedom of association to avoid people and ideas they don't like. It's another thing for the government to do it as an exercise of state authority.
Icke's ideas are welcome enough in Australia that he can sell tickets and pay for his travel expenses. Why is the Australian government contradicting the preferences of Australian citizens freely exercising their rights? Because some Australians want Icke to STFU and go away. Not only do they not want to hear him, they don't want anybody else to hear him.
Well and good. But what's the limiting principle on "deplatforming the worst grifters"?
Some people would argue that theism is a mental disorder and all religions are cults. Should the Australian government deny visas to visiting clergy and lay preachers? Should religious proselytism be banned, Down Under?
What about homeopaths? People who advocate easing Australian firearms restrictions? People who fall outside Australia's political Overton Window?
"Grift" is a crime, fraud and theft and extortion and blackmail. These things are defined in law, with interpretation well established by legal precedent in the courts. "Grift" is also a figure of speech, encompassing a lot of things that are objectionable to some, but not illegal. Race-baiting and campaign promises come to mind. Colluding with lobbyists is often legally permissible, but can be thought of as a kind of "grift". Promoting religion probably strikes a lot of people as a grift of some kind.
"Deplatforming" a convicted fraudster is one thing. But it's not the thing you're talking about here.
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Anyway, Icke's ideas aren't welcome in Australia. I don't have a problem with denying his visa in principle. Nobody is entitled to entry into another country. However, I think that government policy should try not to be capricious, and should try not to gainsay the choices of its own citizens without good reason.
uke2se If your concern is that Icke will radicalize some Australians, do you think it is wise to stop at denying him entry to Australia? Do you think it would make sense if the Aussie government also prohibited Australians from buying his books and disseminating his ideas?
If Icke licensed an Australian citizen to promote his ideas and shill his books, should that be allowed?