I don't see an effective solution; other than just not caring about anyone else's views, including all the people who may be forming them as opposed to holding on to them which doesn't appeal greatly either.
Eh. You don't control the truth, and you can't protect people from falsehood. You have to not treat them as children and let them protect themselves. It's not your responsibility to keep people from barking their shins and scraping their knees (and a damn good thing, too, because you have no power to do so).