The problem isn't misinformation, it's mistrust.
People regularly make emotional decisions instead of well-informed decisions. A primary cause is a dislike and/or distrust of the messenger. Whatever an unliked/untrusted messenger says, they will do the opposite. People will search for a reason, any reason, to do the opposite. We see many examples of this with Trump or Hillary Clinton. The misinformation will present itself if enough people don't want to believe a message. Again, it's not the misinformation, it's the mistrust that drives this behavior. Stupidity such as the Ministry of Truth will only make it worse. You can't regulate emotional thinking into rational action. The more centralized our governing becomes, the more we'll see "misinformation" issues among individuals that are not led by peers but by "elites" and who feel more and more removed from the decision-making processes.
Elites are going to have to get over that not everyone will bow down to their perceived intellectual and moral superiority. Being "right" doesn't matter if enough people think otherwise. Responding with authoritarian edicts will only increase the divide. Make your case and move on - and get over yourselves.