“It isn’t censorship; TED is protecting their brand. If they’re seen giving a voice to a quack, what’s next? Alien abduction and moon landing hoax experts? Serious people would stop watching.”
TED, to my mind, let’s plenty quacks have a voice. Maybe not as whacky as Sheldrake.
I think TED talks are largely silly, but it certainly isn't censorship if they want to change the visibility of one of their videos. It's their property.