[jamespcole2]

News organisations are already obligated to print retractions when they make mistakes and asking a questions(although it is often used by the media as weasel words) is different to deliberately misleading someone.

In regards to the other two evangelical preachers should probably need to specify in advance that there is significant empirical evidence in direct contradiction to their statements before making them publicly.

In the case of the vaccination debate this should definitely be a crime, there is significant empirical evidence to prove that what anti-vaccination campaigners say is false. There is some precedent for this regarding the claims of chiropractors in the US which went to trial and found that they were lying about the efficacy of their treatments. (Also on a side note why would anyone listen to a completely unqualified "celebrity" over the opinions of someone with a PHD in virology or epidemiology. Most of the anti-vaccination campaigners are not adequately qualified to have an opinion on the matter anyway).

Also I feel that it's whether it is for personal gain is a big factor, if you are just ignorant that is unfortunate but not necessarily malicious.

There are also examples here(in Australia) of companies being fined for misleading the public, a notable example is "balance bracelets" being recalled from sale here due to false claims.

That being said despite the similarities between the two there are some pretty large cultural differences between the US and Australia which may make some of my points moot. In general Australia favours stronger consumer protections and government regulations, a free and independent publicly funded media service(ABC) and very negative political campaign adds often backfire and lower the public perception of the person making the attack rather than the other way around. Additionally Australia does not have any explicit legal guarantees of freedom of speech akin to the US constitution so some forms of speech, such as overt racism, are already illegal and people can be denied entry for public statements which indicate "bad character" such as holocaust denial etc.