Holocaust denial
Concept
Mentioned as an example of an idiotic idea that the First Amendment should protect as free speech.
Mentioned in 3 videos
Videos Mentioning Holocaust denial

Why I Left Twitter: A Conversation with Cal Newport (Episode #304)
Sam Harris
Mentioned as an example of an idiotic idea that the First Amendment should protect as free speech.

E10: Twitter & Facebook botch censorship (again), the publisher vs. distributor debate & more
All-In Podcast
Used as an example of content that Facebook eventually decided to censor, highlighting the evolving standards of content moderation.

Connexions - Building Communities and Sharing Knowledge
GoogleTalksArchive
A severe form of misinformation discussed in the context of content moderation and the challenges of maintaining a 'commons'.