This is a great start on how scientists (and journalists) should communicate to the public! Thanks for writing this, and the world would be a better place if everyone remembered to follow these principles.

I think in fact it would be better to go even further: not speak from a position of superiority (even if one knows more), but try to acknowledge the audience and persuade effectively. Here's a recent article on the topic: https://undark.org/2020/03/19/coronavirus-myths/ and here's one of my favourites (in a different field of science) from three years ago: https://deansforimpact.org/why-mythbusting-fails-a-guide-to-...