How effective are they? Just because social media keeps promoting people who promote those ideas doesn't mean they're actually widely and strongly held.
If you really care about misinformation, you'd be more worried about Islam which is explicitly sexist, homophobic, anti-Semitic, anti-science, and supremacist and those beliefs aren't just written in a book somewhere, they're held by most common Muslims. How are we going to eliminate that with censorship when the censors themselves believe it's a good belief? We need smarter people to have the power of censorship so they can distinguish the truly dangerous beliefs from the transient swings of popular culture.