[fault1]

censoring seems like a strong word. it's likely some automated system that based on some frequency analysis detecting whether the dislikes were authentic or not (by some defn of 'authentic').

Without such systems it's trivial to just 'clickfraud' relevancy systems out of whack. Of course Google has has a long record of playing cat/mouse games with this type of behavior due to the entire SEO industry who would manipulate rankings and other signals.

[lovethyenemy]

What makes you think censorship ceases to be censorship when it is automated?