Decoding emojis and defining 'support': Facebook's rules for content revealed

The 300-page document for moderators defines which phrases are ethically unacceptable

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They run to more than 300 pages, envisaging and exemplifying some of the most borderline and ethically challenging uses of the world's biggest social network by its 2.8 billion monthly users.

Secret Facebook guidelines seen by the Guardian show how the company controls its mainly outsourced moderators' work down to the smallest detail, defining its rules so precisely that contractors are told which emojis constitute praise" and which count as condemnation".