I joke with my friends (I'm old) about how great the internet is for looking up information. When I was growing up, someone told you the wrong thing and you just knew the wrong thing for years.

Misinformation and disinformation were terms created by censors as an excuse to censor ideas they didn't like, mostly criticism. What we call misinformation and disinformation has been a property of communication since grunting. People are wrong about stuff, even people who we currently think are right. To censor is going back to just knowing the wrong thing for years because someone with censor powers thought they were right.