Kids simply act on facebook as they would whenever their parents aren't looking. The unfortunate part is that facebook opens up an impersonal culture practically defined by vulgarity and mean-spiritedness. It takes regular bullying to a whole new level.
Good for Brown for pointing this out. 1. He was quoting and it is high school. 2. Maybe parents need to hear exactly the level of sickening hatred and vulgarity their kids engage in when let completely go.

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside