I usually approach these things comparatively, as opposed to absolutely, and that usually starts with evaluating the incentives.

In a libertarian society, each individual keeps their gains and suffers their losses. That increases the opportunity cost of holding wrong views, compared to a society that taxes gains and subsidizes losses. So, you'd expect people in a libertarian society to be more critical and less gullible. Those effects would ripple through the entire information economy, since there would be reduced profits for propagandists and greater for honest prognosticators.

It depends. I've always said that I would rather live in a just (i.e. libertarian) society than the one that's most personally profitable. However, I generally recommend doing what's best for your family, as long as you're not directly victimizing people in the process. It's not like either of us get to choose whether we get to live in libertarianism or not.