In a post at Popular Science titled "Why We're Shutting Off Our Comments," Suzanne LaBarre writes:
Comments can be bad for science. That's why, here at PopularScience.com, we're shutting them off...That is not to suggest that we are the only website in the world that attracts vexing commenters. Far from it. Nor is it to suggest that all, or even close to all, of our commenters are shrill, boorish specimens of the lower internet phyla. We have many delightful, thought-provoking commenters.
But even a fractious minority wields enough power to skew a reader's perception of a story, recent research suggests.
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In other news, YouTube is trying to make their comments less of a cesspool. Gizmodo explains how.